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10th Science Chemistry Assignment Answers 2021 TN SCERT Full Answer Key

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10th Science | Chemistry 

Unit 7  atoms and molecules.

Assignment Answers 2021

TN SCERT Full Answer Key 

10th Science Assignment Answers. 10th Science TN SCERT Assignment Answers, 10th Science Unit 1 TN SCERT Answer key 2021. 10th Standard All Subject TN SCERT Assignment Unit 1 Answers. TN SCERT Announced  1st to 12th All Subject Assignment  Worksheets for Unit 1. Students Can Note that 10th science Unit 1 TNSCERT Assignment.  10th Assignment Answers, 9th Tamil Assignment Answers download PDF. 9th Maths Assignment Answers Unit 1 TNSCER Tamil Medium and English Medium.  

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  Assignment

• Subject: Science | Chemistry
• UNIT-7 Atoms and Molecules

10 th Chemistry -UNIT-7 Atoms and Molecules (Assignment Questions)

Part –a,   i. choose the correct answer, 1. number of electrons, protons and neutrons present in 17cl 35 , 17cl 37 is------- --------.

  a) 17e¯ , 17p+, 17n

17e¯ , 20p+, 19n

  b) 18e¯ , 18p+, 17n

17e¯ , 17p+, 19n

c) 17e¯ , 17p+, 18n  

20e¯ , 20p+, 17n

d) 18e¯ , 17p+, 18n

17e¯ , 17p+, 20n  

2. Isobars are defined as---------

a) Elements show same atomic number with different mass number

b) Elements show same mass number with different atomic number

c) Elements show same valency

d) None of these

3. The Atomicity of Glucose molecule is ________.

  4. the mass of 5 moles of sodium is -------------, 5. number of atoms present in 3 moles of iron is--------.

a) 6.023 x 10 23

b) 18.069 x 10 23

c) 12.046 x 10 23

II. Short Answer.

12. define : relative atomic mass, relative atomic mass of an element is the ratio between the average mass of its isotopes to \(\frac{1}{12^{th}}\)part of the mass of a carbon-12 atom. it is denoted as ar., 13.give any two examples for heteroatomic molecules, hi, hcl, co, hbr, hf., 14.calculate the number of moles in 46 g of sodium, part – c,   iii.write in detail., 17.give the salient features of “modern atomic theory”.

• An atom is no longer indivisible.
• Atoms of the same element may have different atomic mass.
• Atoms of different elements may have the same atomic masses.
• Atoms of one element can be transmuted into atoms of other elements. In other words, an atom is no longer indestructible.
• Atoms may not always combine in a simple whole-number ratio.
• Atom is the smallest particle that takes part in a chemical reaction.
• The mass of an atom can be converted into energy [E = mc2].

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NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12

NCERT Solutions for Class 10 Science – Class 10 Science NCERT Solutions

NCERT Solutions for Class 10 Science:  National Council of Educational Research and Training (NCERT) is a self-governing organization of the Indian government that provides the curriculum for CBSE and some state board schools in India. So the candidates appearing for different board exams of Class 10 can refer to this NCERT Syllabus and prepare for their examinations which in turn helps candidates make a grade.

You can also Download NCERT Solutions for Class 10 Maths in Hindi to help you to revise complete Syllabus and score more marks in your examinations.

NCERT Solutions Class 10 Science – NCERT Class 10 Science Solutions

Here is the chapter-wise Class 10 NCERT Science Solutions in Hindi Medium and English Medium are listed below:

Chapter 1 Chemical Reactions and Equations

• Chemical Reactions and Equations
• रासायनिक अभिक्रियाएँ और समीकरण कक्षा 10 विज्ञान हिंदी में
• Class 10 Chemical Reactions and Equations Important Questions
• Chemical Reactions and Equations Class 10 Notes
• Chemical Reactions and Equations NCERT Exemplar Solutions
• Chemical Reactions and Equations Class 10 Extra Questions

Chapter 2 Acids Bases and Salts

• Acids, Bases, and Salts
• अम्ल, क्षार एवं लवण कक्षा 10 विज्ञान हिंदी में
• Class 10 Acids Bases and Salts Important Questions
• Acids Bases and Salts Class 10 Notes
• Acids Bases and Salts NCERT Exemplar Solutions
• Acids, Bases and Salts Class 10 Extra Questions

Chapter 3 Metals and Non-Metals

• Metals and Non-metals
• धातु और अधातु कक्षा 10 विज्ञान हिंदी में
• Class 10 Metals and Non-metals Important Questions
• Metals and Non-metals Class 10 Notes
• Metals and Non-metals NCERT Exemplar Solutions
• Metals and Non-metals Class 10 Extra Questions

Chapter 4 Carbon and Its Compounds

• Carbon and Its Compounds
• कार्बन और इसके यौगिक कक्षा 10 विज्ञान हिंदी में
• Class 10 Carbon and its Compounds Important Questions
• Carbon and its Compounds Class 10 Notes
• Carbon and its Compounds NCERT Exemplar Solutions
• Carbon and Its Compounds Class 10 Extra Questions

Chapter 5 Periodic Classification of Elements

• Periodic Classification of Elements
• तत्वों के आवर्त वर्गीकरण कक्षा 10 विज्ञान हिंदी में
• Class 10 Periodic Classification of Elements Important Questions
• Periodic Classification of Elements Class 10 Notes
• Periodic Classification of Elements NCERT Exemplar Solutions
• Periodic Classification of Elements Class 10 Extra Questions

Chapter 6 Life Process

• Life Processes
• जैव-प्रक्रम कक्षा 10 विज्ञान हिंदी में
• Class 10 Life Processes Important Questions
• Life Processes Class 10 Notes
• Life Processes NCERT Exemplar Solutions
• Life Processes Class 10 Extra Questions

Chapter 7 Control and Coordination

• Control and Coordination
• नियंत्रण एवं समन्वय कक्षा 10 विज्ञान हिंदी में
• Class 10 Control and Coordination Important Questions
• Control and Coordination Class 10 Notes
• Control and Coordination NCERT Exemplar Solutions
• Control and Coordination Class 10 Extra Questions

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Chapter 8 How do Organisms Reproduce?

• How do Organisms Reproduce
• जीव जनन कैसे करते है कक्षा 10 विज्ञान हिंदी में
• Class 10 How do Organisms Reproduce Important Questions
• How do Organisms Reproduce Class 10 Notes
• How do Organisms Reproduce NCERT Exemplar Solutions
• How do Organisms Reproduce? Class 10 Extra Questions

Chapter 9 Heredity and Evolution

• Heredity and Evolution
• अनुवांशिकता एवं जैव विकास कक्षा 10 विज्ञान हिंदी में
• Class 10 Heredity and Evolution Important Questions
• Heredity and Evolution Class 10 Notes
• Heredity and Evolution NCERT Exemplar Solutions
• Heredity and Evolution Class 10 Extra Questions

Chapter 10 Light Reflection and Refraction

• Light Reflection and Refraction
• प्रकाश-परावर्तन एवं अपवर्तन कक्षा 10 विज्ञान हिंदी में
• Class 10 Light Reflection and Refraction Important Questions
• Light Reflection and Refraction Class 10 Notes
• Light Reflection and Refraction NCERT Exemplar Solutions

Chapter 11 Human Eye and Colourful World

• Human Eye and Colourful World
• मानव-नेत्र एवं रंगबिरंगी दुनियाँ कक्षा 10 विज्ञान हिंदी में
• Class 10 Human Eye and Colourful World Important Questions
• Human Eye and Colourful World Class 10 Notes
• Human Eye and Colourful World NCERT Exemplar Solutions
• Human Eye and Colourful World Class 10 Extra Questions

Chapter 12 Electricity

• Electricity
• विद्युत कक्षा 10 विज्ञान हिंदी में
• Class 10 Electricity Important Questions
• Electricity Class 10 Notes
• Electricity NCERT Exemplar Solutions

Chapter 13 Magnetic Effects of Electric Current

• Magnetic Effects of Electric Current
• विद्युत धारा का चुम्बकीय प्रभाव कक्षा 10 विज्ञान हिंदी में
• Class 10 Magnetic Effects of Electric Current Important Questions
• Magnetic Effects of Electric Current Class 10 Notes
• Magnetic Effects of Electric Current NCERT Exemplar Solutions
• Magnetic Effects of Electric Current Class 10 Extra Questions

Chapter 14 Sources of Energy

• Sources of Energy
• उर्जा के स्रोत कक्षा 10 विज्ञान हिंदी में
• Class 10 Sources of Energy Important Questions
• Sources of Energy Class 10 Notes
• Sources of Energy NCERT Exemplar Solutions
• Sources of Energy Class 10 Extra Questions

Chapter 15 Our Environment

• Our Environment
• हमारा पर्यावरण कक्षा 10 विज्ञान हिंदी में
• Class 10 Our Environment Important Questions
• Our Environment Class 10 Notes
• Our Environment NCERT Exemplar
• Our Environment Class 10 Extra Questions

Chapter 16 Management of Natural Resources

• Management of Natural Resources
• प्राकृतिक संसाधनों का प्रबंधन कक्षा 10 विज्ञान हिंदी में
• Class 10 Management of Natural Resources Important Questions
• Management of Natural Resources Class 10 Notes
• Management of Natural Resources NCERT Exemplar Solutions

NCERT Solutions for Class 10 Science involves concepts from biology, physics, and chemistry. Candidates must possess a detailed knowledge of the NCERT Solutions based on the syllabus to get the good results in the board exams. NCERT Science syllabus for Class 10 is designed to provide a strong foundation for various exams such as JEE, NEET, etc.

So, it is very much important for the students to understand the concepts involved in NCERT Class 10 Physics, NCERT Class 10 Chemistry and NCERT Class 10 Biology while learning to avoid any difficulty in later stages. These NCERT Class 10 Solutions of each chapter will almost represent your NCERT class 10 Science class notes, so read on for more updates on questions and answers.

NCERT Solutions For Class 10 Science Chapter 1

Chemical Reactions and Equations chapter explains the concepts related to chemical reactions and equations. Here, you will know different types of reactions taking place in the surrounding. Some important topics explained in this chapter are:

• Writing and balancing chemical equations
• Different types of chemical reactions
• Combination reaction
• Decomposition reaction
• Displacement reaction
• Double displacement reaction
• Effects of oxidation reactions in everyday life: Corrosion & Rancidity

NCERT Solutions For Class 10 Science Chapter 2

Acids, Bases and Salts chapter mainly explains the difference between acids, bases and salts. It also deals with various types of reactions related to these three forms of chemical compounds. Some important topics involved in this chapter are:

• Chemical properties of acids and bases
• Reaction between acids and bases
• Reactions of metal carbonates and metal hydrogen carbonates with acids
• Reaction of metallic oxides with acids
• Reaction of non-metallic oxide with base
• Acid or base in a water solution
• Determining the strengths of acid or base solutions
• Importance of pH in everyday life
• Nature and formation of different salts
• Chemicals from common salt

NCERT Solutions For Class 10 Science Chapter 3

All the aspects related to metals and non-metals like their physical/chemical properties, reactiveness and various chemical reactions. Important topics covered in this chapter are:

• Physical properties of metals and non-metals
• Chemical properties of metals and non-metals
• Reactions of metals and non-metals
• Occurrence and extraction of metals
• Corrosion and its prevention

NCERT Solutions For Class 10 Science Chapter 4

Carbon and its Compounds chapter describes various features of carbon element and different compounds formed by it.  Give below are the main topics covered in class 10 Science Chapter 4:

• Bonding in Carbon
• Saturated and Unsaturated Carbon Compounds
• Homologous Series
• Nomenclature of carbon Compounds
• Chemical Properties of carbon Compounds
• Properties of some important carbon compounds: Ethanol and Ethanoic Acid

NCERT Solutions For Class 10 Science Chapter 5

Here students get to learn the carious concepts related to the classification of elements. Some major concepts discussed in this chapter are:

• Dobereiner’s Triads
• Newlands’ Law Of Octaves
• Mendeleev’s Periodic Table: Its merits and demerits
• The Modern Periodic Table
• Position of Elements in Modern Periodic Table
• Trends in the Modern Periodic Table

NCERT Solutions For Class 10 Science Chapter 6

Life Processes chapter deals with the various biological processes and reaction taking place in organisms. Some major topics covered in this chapter are:

• What are Life Process?
• Nutrition in Organisms: Autotrophic and Heterotrophic Nutrition
• How do organisms obtain their nutrition
• Nutrition in human beings: Respiration, Transportation and Excretion
• Excretion in human beings and Plants

NCERT Solutions For Class 10 Science Chapter 7

Control and Coordination chapter gives details of different ways in which organisms respond to the stimuli. Here you also get to know about the human nervous system, automatics and voluntary actions, exocrine and endocrine glands, etc. Practice following concepts before working on NCERT solutions:

• Nervous system of human beings
• Reflex actions and their path
• Action of nervous tissues
• Coordination In Plants
• Different ways in which plants respond to stimulus
• Action of different hormones in animals

NCERT Solutions For Class 10 Science Chapter 8

How do Organisms Reproduce chapter students get to learn different methods of reproduction in plants and animals and get aware of the various methods of birth control in humans. Some of the important topics discussed in this chapter are:

• Modes of asexual reproduction: Fission, Fragmentation, Regeneration, Budding, Vegetative propagation, Spore Formation
• Sexual reproduction and its significance
• Sexual reproduction in flowering plants
• Reproduction in Human Beings
• Reproductive systems in human male and female
• Process involved in fertilisation of egg
• Reproductive Health and different ways of birth control

NCERT Solutions For Class 10 Science Chapter 9

Heredity And Evolution chapter deals with the details related to heredity and evolution of different species. Darwin’s theory of evolution and natural selection are also discussed here. Go through the major topics mentioned below:

• Variations observed in different generations
• Rules for Inheritance of Traits
• Mendel’s experiments on expression of traits generation to generation
• Sex determination
• Acquired and Inherited Traits
• Tracing Evolutionary Relationships
• Human Evolution

NCERT Solutions For Class 10 Science Chapter 10

Light Reflection and Refraction  explains the concepts of reflection and refraction of light. It also explains the Image formation by a plane mirror/curved mirrors and lenses. Some important topics to learn from this chapter are:

• Reflection of light
• Image formation by spherical mirrors
• Sign convention for reflection by spherical mirrors
• Mirror formula and magnification
• Refraction of Light
• Refraction through a rectangular glass slab
• Refractive index
• Refraction by spherical lenses
• Image formation by spherical lenses
• Sign Convention for refraction by spherical lenses
• Lens Formula and Magnification
• Power of Lens

NCERT Solutions For Class 10 Science Chapter 11

The Human Eye and Colorful World chapter students get to know each and every detail of the human eye from its structure to its working. Various defects of vision are also discussed here. It also explains atmospheric refraction and various phenomena related to it. Some major topics discussed in this chapter are:

• Structure and working of human eye
• Power of accommodation of human eye
• Defects of vision and their correction
• Refraction of light through a prism
• Dispersion of white light through a glass prism
• Atmospheric refraction and its effects
• Scattering of light (Tyndall Effect) and its applications in nature

NCERT Solutions For Class 10 Science Chapter 12

Electricity  chapter explains electric current, its applications and various effects related to it. Go through the following major topics before starting with the NCERT questions and solutions:

• Introduction to electric current
• Potential difference
• Ohm’s law and its graphical representation
• Factors on which the Resistance of the conductor depends – Resistivity
• Resistors in series and parallel: Calculation of resultant resistance in the series, current and voltage across each resistor
• Advantage of parallel combination over the series combination
• Heating effects of electric circuit: Joule’s law of heating effect of electric current
• Electric fuse

NCERT Solutions For Class 10 Science Chapter 13

Magnetic Effects of Electric Current chapter is all about the magnetic field, field lines, field due to a current carrying conductor, AC and DC generator, Advantages of AC over DC and domestic electric circuits. NCERT Solutions for Class 10 Science Chapter 13 includes following major topics:

• Magnetic field and its representation as field lines
• Magnetic field due to current carrying conductor
• Magnetic field due to the current through a straight conductor
• Right-hand thumb rule
• Magnetic field due to a current through a circular loop
• Magnetic field due to a current in a solenoid
• Force on a current carrying conductor in a magnetic field
• Electric motor
• Electromagnetic induction
• Electric generator
• Domestic electric circuits

NCERT Solutions For Class 10 Science Chapter 14

Sources of Energy: Different forms of energy and their sources are discussed in this chapter. Some of the main topics explained in this chapter are:

• Ideal source of energy
• Conventional sources of energy: Fossil fuels, thermal power plant, hydro power plants
• Bio mass and wind energy as major energy resources
• Non-Conventional Sources of Energy: Solar Energy, Energy from Sea, Geothermal Energy, Nuclear Energy
• Renewable and non-renewable sources of energy and their availability in the long run

NCERT Solutions For Class 10 Science Chapter 15

Our Environment chapter deals with various components of environment components and how human activities are affecting the environment. Some of the main topics discussed in this chapter are:

• Eco system  and its components
• Food chains and webs
• Ozone Layer and its depletion
• Managing the garbage we Produce

NCERT Solutions For Class 10 Science Chapter 16

Sustainable Management of Natural Resources chapter you get to know about the different natural resources, their advantages and conservation efforts. Here main focus should be laid on the following concepts:

• Natural resources and their management
• Management of forests and wild life
• Water harvesting
• Management of fossil fuels; Coal and Petroleum

NCERT Class 10 Science Solutions Pdf

We have also created NCERT class 10 science solutions in PDF format. Click Here to download NCERT class 10 Science Solutions PDF.

FAQs for NCERT Solutions for Class 10 Science

1. Why do I choose NCERT Solutions for CBSE Class 10 Science?

NCERT Class 10 Science Solutions is the perfect guide for CBSE students during their board exam preparation. As it is created by qualified subject teachers as per the latest class 10 CBSE Science Syllabus. You can discover various solved and unsolved questions and exercises along with sample papers & important questions list for every concept on Class 10 NCERT Science Solutions, that aids you to prepare well for board exams.

2. Where can I get NCERT Solutions for Class 10th Science (Physics, Chemistry & Biology)?

LearnCBSE.in allows students to overcome their nightmares with NCERT Books Solutions for all sciences subjects like Physics, Chemistry & Biology for class 10. You can get them online at our website or else directly click on the quick links available on our page.

3. What is the price for NCERT Class 10 Science Solutions Textbooks?

Through our website, you can access NCERT Textbook Solutions for class 10 science for free of cost. So, download CBSE Class 10 Science NCERT Solutions PDF from our page and seek more knowledge of science concepts.

4. What is best for NCERT solutions for class 10 science?

By preparing with NCERT Solutions for science exams provide you various benefits like Important questions, solved and unsolved exercises for each concept, MCQ questions for class 10 board exams, One-word Answers, Assertions, Repetitive questions, previous papers, and many more that help students to score good grades in the preboard and board exams.

5. How can I study science in class 10?

Read & Practice all the concepts of science with NCERT Science Solutions books thoroughly while your exam preparation. Also, solve the previous year question papers of class 10 CBSE science board exams by using NCERT Textbook Solutions for Class 10 Science. NCERT Science Solutions provide a detailed analysis of the curriculum and topics which helps class 10 students to study science in a simple way.

6. How many chapters are there in class 10 science NCERT Books?

With a total of 16 Chapters are contained in the latest class 10 Science syllabus, NCERT Solutions for class 10 science is the best resource to understand all 16 chapters easily. So, download Science NCERT class 10 Solutions of your choice from the quick links available on our page and give your exam preparation a perfect shape with a subject expert’s guidance.

Now that you are provided all the necessary details regarding NCERT Solutions for class 10 Science and we hope this detailed article on NCERT Solutions for Class 10 Science is helpful. If you have any query regarding this article or NCERT Solutions for Class 10 Science, leave your comments in the comment section below and we will get back to you as soon possible.

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NCERT Solutions for Class 10 Science

Class 10 Science | Chemistry Chapter 1: Chemical Reactions and Equations Chapter 2: Acids, Bases and Salts Chapter 3: Metals and Non-Metals Chapter 4: Carbon and its Compounds

Class 10 Science | Biology Chapter 5: Life Processes Chapter 6: Control and Coordination Chapter 7: How do Organisms Reproduce? Chapter 8: Heredity

Class 10 Science | Physics Chapter 9: Light – Reflection and Refraction Chapter 10: Human Eye and Colourful World Chapter 11: Electricity Chapter 12: Magnetic Effects of Electric Current

Class 10 Science | Environmental Studies Chapter 13: Our Environment

NCERT Solutions of Class 10 Science

Get the NCERT Solutions for Class 10 Science all chapters in Hindi and English Medium updated for new session 2024-25. According to revised syllabus and NCERT books issued for academic year 2024-25, there are only 13 chapters in 10th science. If you are planning to Score 100% in Class 10 Science based NCERT solutions, follow the two months preparation for 10th science . Class 10th Science solutions are solve problems related to the science curriculum provided by the National Council of Educational Research and Training (NCERT) in Bharat.

The 10th Science NCERT solutions cover various scientific concepts and topics that students study in their 10th-grade science textbook. Class 10 Science NCERT solutions serve as valuable tools for both students and educators. They provide structured guidance for learning scientific concepts, practicing problem-solving, and preparing for exams. These solutions can be found in the official NCERT textbooks, educational websites, and online platforms.

Science is interconnected with other subjects, such as mathematics, technology, and engineering. Studying science fosters interdisciplinary thinking, helping students see how concepts from different fields can be applied to solve complex problems. Tiwari Academy typically offers comprehensive solutions to the Class 10 Science NCERT textbook. These solutions include detailed explanations and step-by-step instructions for solving problems and understanding concepts.

Here are some tips on how to score well using Tiwari Academy’s Class 10 Science NCERT Solutions . This will help you to understand the concepts and to identify the areas where you need help. The solutions should not be used as a substitute for studying the textbook. Revise the solutions regularly. This will help you to retain the information and to prepare for your exams.

Class 10 Science NCERT solutions align with the CBSE board exam pattern and help students prepare effectively for their science exams. Some solutions may include interactive elements like activities and experiments that engage students in hands-on learning. These are aligned with the Class 10 Science syllabus , ensuring that students cover the required topics and concepts. Additional notes or explanations may be provided for teachers and parents to assist in explaining concepts to students. Many educational resources on Tiwari Academy are often available for free compared to traditional textbooks or coaching classes. This affordability can be advantageous for students and parents.

Students must effectively communicate their findings and ideas in science. This includes writing clear reports, making presentations, and engaging in discussions. Improved communication skills are beneficial in all areas of education.

Practice solving problems from the textbook and from the Tiwari Academy NCERT Solutions. This will help you to develop your problem-solving skills and to identify any areas where you need to improve. Use Tiwari Academy’s NCERT Solutions in conjunction with other resources, such as previous year exam papers and sample papers. This will help you to get a better understanding of the types of questions that are likely to be asked in your exams.

So, the students of UP Board also get the UP Board Solutions for Class 10 Science in Hindi Medium or English Medium. All the NCERT Solutions Offline Apps are fully updated for the current academic session. Apart from CBSE and UP Board Students, NCERT Solution is free for Bihar board, Gujrat Board, Uttarakhand Board, MP Board (Madhya Pradesh Board, Jammu and Kashmir Board of School Education (jkbose), whosoever are following NCERT Textbooks.

Scientific research often involves setbacks and failures. Learning to cope with failures and continue working toward a solution cultivates perseverance and resilience. For UP board (High School) students, Class X solutions are prepared in Hindi Medium. If the Student of any board whether CBSE or UP Board or any other board, facing any problem to get 10th Science Solutions in Hindi or English Medium, please contact us for help without any charge.

Key features of Class 10 Science NCERT solutions includes a wide range of scientific topics including physics, chemistry, biology, and environmental science. These topics include concepts such as force, energy, chemical reactions, reproduction, genetics, and more. Solutions provide clear and simple explanations that make complex scientific concepts easier to understand for 10th-grade students. No charge, no login or password, no promotion calls from Tiwari Academy, only peaceful study of science of standard 10.

All the solutions are updated for new academic session. Students of UP Board, MP Board, Gujrat Board and all other boards can use these solutions because they are following latest NCERT Textbooks for X . Make a study schedule and stick to it. This will help you to stay on track and to make sure that you cover all of the important topics. Find a study partner or group. Take breaks when you need them. It is important to take breaks when you are studying so that you do not get overwhelmed. Get enough sleep. I hope these tips help you to score well in your Class 10 Science exams.

Class 10 Science Chaptertwise Important Questions for Exams Practice

• Class 10 Science Chapter 1 Important Questions
• Class 10 Science Chapter 2 Important Questions
• Class 10 Science Chapter 3 Important Questions
• Class 10 Science Chapter 4 Important Questions
• Class 10 Science Chapter 5 Important Questions
• Class 10 Science Chapter 6 Important Questions
• Class 10 Science Chapter 7 Important Questions
• Class 10 Science Chapter 8 Important Questions
• Class 10 Science Chapter 9 Important Questions
• Class 10 Science Chapter 10 Important Questions
• Class 10 Science Chapter 11 Important Questions
• Class 10 Science Chapter 12 Important Questions
• Class 10 Science Chapter 13 Important Questions

Remember that consistency, thorough understanding, and practice are key to performing well in Class 10 Science. Science ignites curiosity and encourages students to ask questions and seek answers. This sense of inquiry extends beyond science classes and can motivate students to explore other subjects with the same level of curiosity. Tiwari Academy’s resources can be a valuable aid, but your dedication and effort play a crucial role in achieving good marks. There are a number of reasons why Tiwari Academy is considered to be one of the best platforms for Class 10 Science solutions .

1. Tiwari Academy’s NCERT solutions are written by experienced subject matter experts and cover all of the important topics in the textbook. The solutions are accurate and easy to understand.

2. Tiwari Academy’s NCERT solutions provide step-by-step solutions to all of the problems in the textbook. This helps students to understand how to solve problems and to develop their problem-solving skills.

3. Tiwari Academy’s NCERT solutions are aligned with the CBSE syllabus. This means that by studying the Tiwari Academy NCERT solutions, students can be sure that they are covering all of the important topics that will be on their exams.

4. Tiwari Academy’s NCERT solutions are available in both English and Hindi. Tiwari Academy’s NCERT solutions are available for free online. This makes them accessible to all students, regardless of their financial background.

Science education also involves discussions about ethical and moral considerations, such as responsible research practices and the implications of scientific discoveries. This promotes ethical reasoning and decision-making.

In addition to these general benefits, Tiwari Academy’s NCERT solutions for Class 10 Science can also help students to improve their conceptual understanding of the subjects. The solutions explain the concepts in the textbook in a clear and concise manner. This helps students to develop a deep understanding of the subjects, which is essential for success in their exams. Science often connects classroom learning to real-world issues and challenges. This practical application of knowledge helps students see the relevance of what they are learning and how it can be used to address real-life problems.

Improve their performance in their exams. The Tiwari Academy Class 10 Science NCERT solutions are designed to help students to answer the types of questions that are likely to be asked in their exams. Overall, Tiwari Academy is a great resource for students who want to excel in their Class 10 Science exams and to prepare for success in their future.

Class 10 Science Notes for Session 2024-25

• 10th Chemistry: Chemical Reactions and Equations Class 10 Science Chapter 1 Notes Read more
• 10th Chemistry: Acids, Bases and Salts Class 10 Science Chapter 2 Notes Read more

Here are some additional tips that may be helpful for students using Tiwari Academy’s NCERT solutions for Class 10 Science . Use the solutions in conjunction with your textbook and other resources. The solutions should not be used as a substitute for studying the textbook. Instead, they should be used to check your understanding of the concepts and to solve problems.

Don’t be afraid to ask for help. If you are having difficulty understanding a concept or solving a problem, ask your teacher or a friend for help. Practice regularly. Try to solve some problems from the textbook or from the Tiwari Academy NCERT solutions every day. Don’t give up. Science can be challenging, but it is also rewarding. If you keep practicing and don’t give up, you will eventually succeed.

10th Science Chapterwise Previous Years CBSE Board Questions

• 10th Science Chapter 1 Board Exam Questions
• 10th Science Chapter 2 Board Exam Questions
• 10th Science Chapter 3 Board Exam Questions
• 10th Science Chapter 4 Board Exam Questions
• 10th Science Chapter 5 Board Exam Questions
• 10th Science Chapter 6 Board Exam Questions
• 10th Science Chapter 7 Board Exam Questions
• 10th Science Chapter 8 Board Exam Questions
• 10th Science Chapter 9 Board Exam Questions
• 10th Science Chapter 10 Board Exam Questions
• 10th Science Chapter 11 Board Exam Questions
• 10th Science Chapter 12 Board Exam Questions
• 10th Science Chapter 13 Board Exam Questions

Tiwari Academy is known for providing educational resources and solutions for various subjects, including Class 10 Science. However, I cannot provide real-time information, and the reputation and quality of educational platforms can change over time. To determine why Tiwari Academy may have been considered the best for Class 10 Science Solutions, you would need to consider factors given below:

Tiwari Academy may have offered a wide range of study materials, including textbook solutions, practice questions, and explanations, to help students cover the entire Class 10 Science Solutions and syllabus. The platform may have provided high-quality and well-explained solutions to textbook questions and other practice problems, helping students understand concepts better.

Class 10 Science MCQ Tests for Session 2024-25

• Chapter 1: Chemical Reactions and Equations Class 10 Science Chapter 1 MCQ Read more
• Chapter 2: Acids, Bases and Salts Class 10 Science Chapter 2 MCQ Read more
• Chapter 3: Metals and Non-Metals Class 10 Science Chapter 3 MCQ Read more
• Chapter 4: Carbon and its Compounds Class 10 Science Chapter 4 MCQ Read more
• Chapter 5: Life Processes Class 10 Science Chapter 5 MCQ Read more
• Chapter 6: Control and Coordination Class 10 Science Chapter 6 MCQ Read more
• Chapter 7: How do Organisms Reproduce Class 10 Science Chapter 7 MCQ Read more
• Chapter 8: Heredity and Evolution Class 10 Science Chapter 8 MCQ Read more
• Chapter 9: Light – Reflection and Refraction Class 10 Science Chapter 9 MCQ Read more
• Chapter 10: Human Eye and the Colourful World Class 10 Science Chapter 10 MCQ Read more
• Chapter 11: Electricity Class 10 Science Chapter 11 MCQ Read more
• Chapter 12: Magnetic Effects of Electric Current Class 10 Science Chapter 12 MCQ Read more

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Positive reviews and recommendations from students, teachers, or educational experts could contribute to its reputation as the best platform for Class 10 Science Solutions . Extra features like video tutorials, sample papers, and tips for exam preparation may have made Tiwari Academy stand out. As the exams approach, dedicate time to revision. Go through your notes and Tiwari Academy’s solutions again. Focus on problem-solving, and make sure you’re confident in your understanding of all topics.

To determine whether Tiwari Academy is still considered the best for Class 10 Science Solutions in 2024-25, check recent reviews, conducting online research, and asking for recommendations from teachers, classmates, or educational forums. Keep in mind that educational platforms can evolve and change, so it’s important to verify their current status and effectiveness. Regularly assess your progress by taking mock tests or quizzes. Tiwari Academy may have such resources available. Analyze your performance, identify weak areas, and focus on improving them.

NCERT of all chapters (Physics, Chemistry and Biology) are given in the section of solution. Important derivations, numerical problems, practice test and assignments will also have uploaded time to time. Class 10 Science Solutions often incorporate diagrams, illustrations, and images to visually explain concepts and enhance understanding. For problems and questions, solutions offer step-by-step explanations, guiding students through the process of solving and understanding. Through holiday homework page you can upload you summer holiday, if need help, we will provide the solutions and suggestions according to requirements. Offline Solutions Apps works without Internet.

How to Perform Better in Class 10 Science Exams?

If you are preparing to compete with the toppers of the class to achieve more than 90% in Science or if you want to pursue your study with the science stream, you must focus upon these three sections of science Physics, Chemistry, and biology. People with the target 100% or A+ achieve, the score with sheer will perseverance and that is what you need to achieve first. Tiwari Academy’s online platform allows students to access study materials at any time and from anywhere with an internet connection. This flexibility can accommodate different learning schedules and preferences. Any student with the average IQ and dedication will be able to achieve 90% but people who want to surpass the 90% threshold and go beyond to achieve 100% in science need to keep in mind that there is not shortcut to the success.

Step 1: Prepare the chapter from NCERT, figuring out the main terms.

Step 2: plan and study according to time table., step 3: prepare the list of formulae, diagrams and experiments., step 4: take help from class 10 science ncert solutions., step 5: keep distance from distractions during the study..

Incorporating scientific thinking and problem-solving skills into the curriculum benefits students in all areas of education and equips them with valuable skills that extend far beyond the confines of the science classroom. These skills are essential for academic success, lifelong learning, and success in various careers and life endeavors. To get good marks in Class 10 Science using Tiwari Academy’s Class 10 Science NCERT Solutions or any similar educational resource, you can follow these steps:

Understand the Syllabus : First, ensure that you have a clear understanding of the Class 10 Science syllabus. Know what topics are covered and the weightage of each chapter in the exam.

Use the NCERT Textbook : Start by thoroughly reading your Class 10 Science NCERT textbook. Understand the concepts and ideas presented in each chapter. Tiwari Academy’s solutions often complement the NCERT textbook, so use them in conjunction.

Solve NCERT Questions : Tiwari Academy typically provides solutions to the questions presented in the NCERT textbook. After reading a chapter, attempt the questions on your own and then refer to Tiwari Academy’s solutions to check your answers and understanding.

Practice Additional Problems : Besides the NCERT questions, Tiwari Academy may offer additional practice problems. Utilize these to further reinforce your understanding of the concepts and improve problem-solving skills.

Focus on Understanding : Don’t just memorize solutions. Focus on understanding the underlying concepts. This will help you answer questions even if they are presented differently in the exam.

Create a Study Schedule : Plan your study schedule in a way that you allocate sufficient time to each chapter according to its weightage in the exam. Make a realistic timetable that includes regular breaks. These notes will be helpful during revision. Tiwari Academy’s solutions can be a valuable source for summarizing important points.

Online Resources : If Tiwari Academy offers video lectures or animations related to Class 10 Science topics, consider using them for better visualization and understanding of complex concepts.

Practice Previous Year Papers : Work through previous years’ question papers and sample papers. Tiwari Academy may also provide these. This will help you become familiar with the exam pattern and the types of questions asked.

Many solutions include real-life examples and applications of scientific principles, helping students relate concepts to their everyday experiences. Solutions include practice questions and exercises that allow students to apply their understanding and practice problem-solving skills.

How to score 100 percent marks in exams of Class 10 Science?

Most of the questions asked in CBSE board exams are from NCERT only. Students are advised to read thoroughly each chapter of NCERT Textbook and try to make a quick note for revision. During the study of chapters, the activity related to topics must be done carefully. Now a days activity based questions are also asked in board exams. Once completed the NCERT book, student must revision the entire class 10 science through NCERT Exemplar book. It will enhance your confidence and help to identify the weak area science syllabus. Following this process, one can score easily 95% to 100% marks in 10th Science board exams.

Which is the most difficult chapter in Class 10 Science final exams?

There are total 13 chapters in Class 10 Science NCERT Textbook. Most of the chapters are easy to understand and help to score well in exams. Out of these chapters, chapter 11 Electricity is considered as the most difficult chapter of the book which is in second term syllabus. There are two reasons for being difficult. First, the chapter is little bit lengthy having too many formulae and concepts of electricity and secondly there are many numerical in the chapter increase the level of difficulty. If a student spend a bit of time regularly on this chapter, the chapter automatically become easy to understand.

Which is the best book for the preparation of Class 10 Science 1st and 2nd term exams?

If you check the question papers of CBSE board exams or CBSE Sample papers, the questions are directly or indirectly asked from NCERT Textbook only. To get a perfect preparation of 10th Science exams, NCERT Book provides the best study material for the students. If someone need more to practice as well as self-evaluation, please refer Exemplar book published by NCERT.

How to download Class 10 Science NCERT book and solutions for CBSE Session 2024-25?

The updated format of 10th Science Solutions for academic session 2024-25 are given on Tiwari Academy website free to use. All the solutions of numerical and answers of questions are done by the expert teachers. Class 10th Science Solutions are made in such a way it can be understood by all categories of students. The answers of grade 10 NCERT Textbook intext questions are also given along with the exercises solutions.

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CBSE Class 10 Science Answer Key 2021: Check CBSE answer key for all series as shared by board

CBSE Class 10 Science Term 1 Exam 2021 Answer Key has been shared by experts. Check your responses, download Class 10 science answer key pdf.

Central Board of Secondary Education, CBSE Answer Key 2021-22 for Class 10 Science Term 1 question paper has been prepared by subject experts now. Teachers with years of experience have shared the answer key for today’s examination below for students to check and tally their responses with. CBSE Class 10 Science Answer Key pdf for download along with question paper is also provided below for reference.

The board has shared the answer key for the various question paper series. Different series of Question paper had different answer key. All the answer key for the different series is provided below for reference. The CBSE answer key series along with the Question Paper or QP Code is provided for reference. The question paper code would be provided on the right hand top corner of the paper. 

Also Read |  CBSE Sample Paper 2021-22: Class 10 French, German sample papers with solutions, paper pattern

CBSE Answer Key 2021 Class 10 Science: Series JSK/1 | QP CODE No. 031/1/4

CBSE Answer Key Class 10 Science - Series : JSK/1 QP CODE No. 031(B)/1/4

CBSE Answer Key Class 10 Science - Series : JSK / 2 QP CODE No. 031/2/4

Students can also Download CBSE Answer Key 2021-22 Class 10 Science pdf here | Question Paper Class 10 Science

Disclaimer: The answers have been provided by experts with years of experience in teaching the subject. Times Now takes no responsibility of the accuracy of the responses. They have been provided only for reference purposes. 

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10th Science English Medium 2nd Assignment July 2021 Answerkey:- To help 10th class Tamil Nadu students we provide answerkey for the 10th science English medium 2nd assignment answer key here.we also have Tamil medium science 2nd assignment on another page

Assignment Class-10 Subject: SCIENCE UNIT – VII- Atoms and Molecules Part – A I.One Mark Questions

1. number of electrons, protons and neutrons present in 17cl35, 17cl37 is……………..

a) 17e ̄ , 17p+, 17n 17e ̄ , 17p+, 19n b) 18e ̄ , 18p+, 17n 17e ̄ , 20p+, 19n c) 17e ̄ , 17p+, 18n 17e ̄ , 17p+, 20n d) 18e ̄ , 17p+, 18n 20e ̄ , 20p+, 17n

Answer:- a) 17e ̄ , 17p+, 17n 17e ̄ , 17p+, 19n

2. Isobars are defined as………..

a) Elements show same atomic number with different mass number b) Elements show same mass number with different atomic number c) Elements show same valency d) None of these

Answer:- b) Elements show same mass number with different atomic number

3.The Atomicity of Glucose molecule is………………..

Answer:- c)24

4.The mass of 5 moles of sodium is……….

Answer:- d) 115g

5.Number of atoms present in 3 moles of iron is——–

a) 6.023 x 1023

b) 18.069 x 1023

c) 12.046 x 1023

Answer:- b) 18.069 x 1023

Part – B II. Short Answer.

6.define : relative atomic mass, 7.give any two examples for heteroatomic molecules.

HI, HCl, CO, HBr, HF.

8.Calculate the number of moles in 46 g of Sodium?

Formula to calculate the no. of moles:

No of moles = known mass of a substance/ molar mass of the substance.

No. of moles of Na= 46 / 23

                            =  2 moles

So in 46 grams, 2 moles of Na are present.

9.Calculate the mass of the 5×10 23 molecules of Glucose.

10.calculate the number of molecules in 11.2 litre of co 2 at s.t.p., part – c iii. write in detail., 1.give the salient features of “modern atomic theory”..

The salient features of “Modem atomic theory” are,

• An atom is no longer indivisible.
• Atoms of the same element may have different atomic mass.
• Atoms of different elements may have the same atomic masses.
• Atoms of one element can be transmuted into atoms of other elements. In other words, an atom is no longer indestructible.
• Atoms may not always combine in a simple whole-number ratio.
• Atom is the smallest particle that takes part in a chemical reaction.
• The mass of an atom can be converted into energy [E = mc 2 ].

Assignment Class-10 Subject:SCIENCE UNIT – XII Plant Anatomy and Plant Physiology Part – A I. OneMark Questions

1.who is the father of plant anatomy.

b) Nehemiah Grew

c) Melvin Calvin

d) C.N.R.Rao

Answer : b) Nehemiah Grew

2.The group of cells which are similar or dissimilar in structure and origin that perform similar function is called

a) Organ System

b) Vascular Bundles

d) Pericycle

Answer : c) Tissues

3.The pores present in Epidermis are called

c) Trichome

Answer : a) Stomata

4.Xylem and Phloem are present in different radii of ———-

Answer : a) root (Xylem and phloem are arranged in an alternate matter or different radii are called Radial vascular bundle. Eg: roots)

5.If xylem and phloem lie on the same radii that vascular bundle is…..

a) radial bundle

b) conjoint bundle

c) concentric and amphivasal

d) amphicribral

Answer : b) conjoint bundle

1.What are tissues?

2.classify the types of plant tissues..

Merismatic tissue and permanent tissue

3.What are the functions of Dermal or Epidremal tissue system?

• Epidermis protects the inner tissues.
• Stomata helps in transpiration.
• Root hairs help in absorption of water and minerals.

4.Write a short note about vascular bundle of Dicot root.

5.what is radial vascular bundle give example..

Radial vascular bundle: Xylem and phloem are arranged in an alternate matter or different radii are called Radial vascular bundles. Eg: roots

6.a)Differentiate the following Monocot root and Dicot root

b) Draw a neat labelled diagram of Radial vascular bundle

Assignment 2 science

Please give all the assignment in clear and neet it is conference us please send it neet all the subject

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Tn 10th science assignment answer key 2021 , tnscert kalvi tv assignment, tn 10th science assignment answer key 2021 , tnscert kalvi tv assignment , students can download 10th  assignment answers and question paper unit 1.tamil medium and english medium, tnscert 10th science assignment pdf download with answer tamil medium , english medium  , tn 10th  science assignment  question paper ,answer key, 10th science assignment unit 1 - pdf download -em 10th science assignment unit 1 - pdf download -tm, 10th science assignment  question paper ,answer key, 10th science tn scert unit 1 answers,  assignment, class:10 subject: science | physics unit-1 laws of motion part – a, i. choose the correct answer, 1. inertia of a body depends on-------------- a) weight of the object  b) acceleration due to gravity  c) mass of the object d) both a and b ans:  c) mass of the object 2. in a rocket, a large volume of gases produced by the combustion of fuel is allowed to escape through its tail nozzle in the downward direction with the tremendous speed and makes the rocket to move upward. which principle is followed in this take off of the rocket a) moment of inertia  b) conservation of momentum  c) newton’s first law of motion  d) newton’s law of gravitation 3. there are two statements a) newton’s first law is valid from the pilot in an aircraft which is taking off b) newton’s first law is valid from the observer in a train moving with constant velocity which of the following is correct  a) a only  b) b only  c) both a and b d) both a and b wrong  4. which of the following law is used to discover new stars and planets  a) newton's first law b) newton's second law  c) newton's third law  d) newton's law of gravitation 5. the resultant force of two equal parallel forces acting in opposite direction in the same line of action is a) fnet = f1 + f2  b) fnet = f2-f1  c) fnet = f2+f1  d) fnet=0, part – b,  ii. short answer, 11. define inertia. give its classification the inherent property of a body to resist any change in its state of rest or the state of uniform motion, unless it is influenced upon by an external unbalanced force, is known as ‘inertia’. classifications: inertia of rest inertia of motion inertia of direction   12 if a 5n and a 15n forces are acting opposite to one another. find the resultant force and the direction of action of the resultant force., 13. state newton’s second law., the force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the direction of the force., part – c, iii. write in detail, 18. what are the types of inertia give an example for each type types of inertia: inertia of rest: the resistance of a body to change its state of rest is called inertia of rest. e.g.: when you vigorously shake the branches of a tree, some of the leaves and fruits are detached and they fall down (inertia of rest). the inertia of motion:  the resistance of a body to change its state of motion is called inertia of motion. e.g.: an athlete runs some distance before jumping. because this will help him jump longer and higher. (inertia of motion) inertia of direction: the resistance of a body to change its direction of motion is called inertia of direction. e.g.: when you make a sharp turn while dr,  assignment class:10 subject: science | chemistry unit-7 atoms and molecules 10th chemistry -unit-7 atoms and molecules (assignment questions) part –a,  i. choose the correct answer, 1. number of electrons, protons and neutrons present in 17cl35, 17cl37 is------- --------  a) 17e¯ , 17p+, 17n 17e¯ , 20p+, 19n  b) 18e¯ , 18p+, 17n 17e¯ , 17p+, 19n c) 17e¯ , 17p+, 18n   20e¯ , 20p+, 17n d) 18e¯ , 17p+, 18n 17e¯ , 17p+, 20n   2. isobars are defined as--------- a) elements show same atomic number with different mass number b) elements show same mass number with different atomic number c) elements show same valency d) none of these 3. the atomicity of glucose molecule is ________. a) 6 b) 12 c)24 d) 18  4. the mass of 5 moles of sodium is ------------- a) 46g b)  34g c) 105g d) 115g 5. number of atoms present in 3 moles of iron is-------- a) 6.023 x 1023 b) 18.069 x 1023 c) 12.046 x 1023 d) none, ii. short answer., 12. define : relative atomic mass relative atomic mass of an element is the ratio between the average mass of its isotopes to \( '\frac{1}{12^{th}}\' )part of the mass of a carbon-12 atom. it is denoted as ar. 13.give any two examples for heteroatomic molecules hi, hcl, co, hbr, hf. 14.calculate the number of moles in 46 g of sodium,  iii.write in detail. 17.give the salient features of “modern atomic theory” the salient features of “modem atomic theory” are, an atom is no longer indivisible. atoms of the same element may have different atomic mass. atoms of different elements may have the same atomic masses. atoms of one element can be transmuted into atoms of other elements. in other words, an atom is no longer indestructible. atoms may not always combine in a simple whole-number ratio. atom is the smallest particle that takes part in a chemical reaction. the mass of an atom can be converted into energy [e = mc2].iving a car, you tend to lean sidewa., 10th science tn scert unit 12 answers, class:10 subject: science | chemistry unit 12 - plant anatomy and plant physiology, biology unit-12 plant anatomy and plant physiology, part – a, 1. who is the father of plant anatomy a) sachs  b) nehemiah grew  c) melvin calvin  d) c.n.r.rao 2. the group of cells which are similar or dissimilar in structure and origin that perform similar function is called  a) organ system  b) vascular bundles  c) tissues  d) pericycle 3. the pores present in epidermis are called a) stomata  b) cuticle  c) trichome  d) stele 4. xylem and phloem are present in different radii of ----------  a) root  b) stem  c) leaf  d) flower 5. if xylem and phloem lie on the same radii that vascular bundle is --------------  a) radial bundle  b) conjoint bundle  c) concentric and amphivasal  d) amphicribral part - b  ii. short answer   11.what are tissues 12.classify the types of plant tissues. answer: epidermis protects the inner tissues. stomata helps in transpiration. root hairs help in absorption of water and minerals. 13.what are the functions of dermal or epidremal tissue system answer: the outer most covering layer of plants. it contains epidermis, stomata and epidermal out growths. epidermis are interrupted by many minute pores called stomata. epidermis is covered by cuticle to check evaporation of water. trichomes and root hairs are some epidermal growths., iii. write in detail, 16.a)differentiate the following monocot root and dicot root b) draw a neat labelled diagram of radial vascular bundle 17.a) write the components and functions of plant tissue system. b) classify the tissues based on their ability to divide ys,  (inertia of direction). மேலே உள்ள டவுன்லோட் என்ற பட்டனை கிளிக் செய்து உங்களுக்கான வினாக்களை டவுன்லோட் செய்து கொள்ளலாம்., no comments:, post a comment.

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CBSE 10th Science Answer Key 2021-22 (By Subject Experts): Term 1 CBSE Board Exam 2021-22!

Check cbse science answer key 2021-22 of term 1 cbse class 10 board exam 2021-22 (term 1) along with question paper & reviews..

Check CBSE Science answer key 2021-22 of Term 1 CBSE Class 10 board exam 2021-22 (Term 1) along with question paper & reviews. CBSE Answer Key 2021-22 for Class 10 Science board exam 2021-22 (Term 1) question paper has been verified by CBSE School teachers. The PDF of the CBSE Class 10th Science question paper (Term 1 CBSE board exam 2021-22) has been provided by Jagran Josh along with the review & feedback of students. One can access paper and reviews from the links given below.

CBSE Answer Key: 10th Maths Term 1 (Advanced/Standard) CBSE Board Exam 2021-22

CBSE Answer Key: 10th Maths (Basic) Term 1 CBSE Board Exam 2021-22 CBSE Class 10 Maths Term 1 Exam Analysis: Moderately tough paper with a few tricky questions; Students feedback, Answer Key here

CBSE Class 10 Science Term 1 Exam 2021-22 Over: Download Question Paper, Answer Key; Check Exam Analysis

CBSE Class 10 Science Term 1 Exam Analysis (by Experts) & Students’ Feedback

CBSE Class 10 Science Answer Key 2021-22 (Term 1): CBSE Board Exam 2021-22

1. A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is

(a) Grey, Ba2SO4

(b) Yellow, Ba(SO4)2,

(c) White, BaSO4

(d) Pink, BaSO4,

Answer: (c) White, BaSO4

2. Which of the following oxide(s) is/are soluble in water to form alkalis?

(i) Na2O (ii) SO2 (iii) K2O (iv) NO2

(a) (i) and (iii)

(b) (i) only

(c) (ii) and (iv)

(d) (iii) only

Answer: (a)

3. Study the diagram given below and identify the gas formed in the reaction.

(a) Carbon di-oxide which extinguishes the burning candle.

(b) Oxygen due to which the candle burns more brightly.

(c) Sulphur dioxide which produces a suffocating smell.

(d) Hydrogen which while burning produces a popping sound.

Answer: (d)

4. Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is  (a) Na(s) + 2H20(l) → 2NaOH(aq) + 2H2(g)  (b) 2Na(s) + 2H2O(l) →  2NaOH(aq) +H2(g)  (c) 2Na(s) + 2H20(l) → NaOH(aq) + 2H2(g)  (d) 2Na(s) + H20(l) - 2NaOH(aq) + 2H2(g) Answer: (b)

5. Which of the options in the given table are correct?  Option | Natural Source | Acid Present  (i)  Orange | Oxalic acid  (ii) Sour milk | Lactic acid  (iii) Ant sting | Methanoic acid  (iv) Tamarind | Acetic acid  (a) (i) and (ii) (b) (i) and (iv)  (c) (ii) and (iii) (d) (ii) and (iv) Answer: (c)

6. C6H12O6 (aq) + 602(aq) →6CO2(aq) + 6H2O  The above reaction is a/an  (a) displacement reaction (b) endothermic reaction  (c) exothermic reaction (d) neutralisation reaction

Answer: (c)

7. Which of the following statements about the reaction given below are correct?  MnO2 + 4HCI → MnCl2 +2H20 + Cl2  (i) HCl is oxidized to Cl2  (ii) MnO2 is reduced to MnCl2  (iii) MnCl2 acts as an oxidizing agent  (iv) HCl acts as an oxidizing agent  (a) (i), (iii) and (iv) (b) (i), (ii) and (iii)  (c) (i) and (ii) only (d) (iii) and (iv) only Answer: 7. (c)

8. Select from the following the statement which is true for bases.  (a) Bases are bitter and turn blue litmus red.  (b) Bases have a pH less than 7 (c) Bases are sour and change from red litmus to blue.  (d) Bases turn pink when a drop of phenolphthalein is added to them. Answer: (d) Bases turn pink when a drop of phenolphthalein is added to them.

9. Study the following table and choose the correct option:       Salt - Parent Acid - Parent Base - Nature of Salt  (a) Soidum Chloride - HCI - NaOH - Basic  (b) Sodium Carbonate - H2CO3 -  NaOH - Neutral  (c) Sodium Sulphate - H2SO4 -  NaOH - Acidic  (d) Sodium Acetate - CH3COOH - NaOH - Basic Answer: (d) Sodium Acetate - CH3COOH - NaOH - Basic 

10. It is important to balance the chemical equations to satisfy the law of conservation of mass. Which of the following statements of the law is incorrect?  (a) The total mass of the elements present in the reactants is equal to the total mass of the elements present in the products.  (b) The number of atoms of each element remains the same, before and after a chemical reaction.  (c) The chemical composition of the reactants is the same before and after the reaction  (d) Mass can neither be created nor can it be destroyed in a chemical Reaction. Answer 10: (c) The chemical composition of the reactants is the same before and after the reaction 

12. In Living organisms During respiration which of the following Products are not formed if oxygen is not available? (a) Carbon dioxide + Water (b) Carbon dioxide + Alcohol (c) Lactic acid + Alcohol (d) Carbon dioxide + Lactic Acid Answer: (b) Carbon dioxide + Alcohol

13. The Correct Statements with reference to single called organisms are (i) Complex substances are not broken down in to simpler substances. (ii) Simple diffusion is sufficient to meet the requirement of exchange of gases. (iii) Specialized tissues perform different functions in the organism. (iv) Entire surface of the organism is in contact with the environment for taking in food. (a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

14. Which one among the following is not removed as a waste product from the body of a plant? (a) Resins and Gums (b) Urea (c) Dry Leaves (d) Excess Water

Answer: (b)

Answer 15: (d)

Answer 16: (c)

17. In which of the following is a concave mirror used? (a) A solar cooker (b) A rear view mirror in vehicles (c) A safety mirror in shopping malls (d) In Viewing full size image of distant tall buildings.

Answer 17: (a)

Answer 18: (c)

19. The following diagram shows the use or an optical device to perform an experiment of light. As per the arrangement shown, the optical device is likely to be a;

(a) Concave mirror (c) Convex mirror (b) Concave lens (d) Convex lens

Answer 19: (b)

20. A ray of light starting from air passes through medium A of refractive index 1.50, enters medium B of refractive index 1.33 and finally enters medium C of refractive index 2.42. If this ray emerges out in air from C, then for which of the following pairs of media the bending of light least? (a) air-A (b) A-B (c) B-C (d) C-air

Answer 20: (b) 

21. which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the atmosphere. (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir. d) The fine particles in the atmospheric air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Answer 21: (c)

22. https://img.jagranjosh.com/images/2021/December/2122021/CBSE-Science-Paper-Term-1-2021-Question-22.jpg For the diagram shown according to the new Cartesian sign convention the magnification of the image formed will have the following specifications: (a) Sign - Positive, Value — Leas than 1 (b) Sign — Positive, value - More than 1 (c) Sign — Negative, Value — Less than 1 (d) Sign Negative, value — More than 1

Answer 22: (b)

Answer 23: (c) 

(a) Colour of sky as seen from earth during the day. (b) colour of the sky as seen from the moon. (c) Colour used to paint the danger signals. (d) Colour of sun at the time of noon

Answer 24: (c) 

Answer 25: (d)

Answer 26: (c)

Answer 27. (d)

Answer 28. (d)

29. The pair(s) which will show displacement reaction is/are (i) NaCl solution and copper metal (ii) AgNO3 solution and copper metal (iii) Al2(SO4)3 solution and magnesium metal (iv) ZnSO4 solution and iron metal (a) (ii) only (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (ii)

Answer 29. (c)

30. Which of the following salts do not have the water of crystalisation? (i) Bleaching Powder (ii) Plaster of Paris (iii) washing soda (iv) Baking soda (a) (ii) and (iv) (b) (i) and (iii) (c) (ii) and (iii) (d) (i) and (iv)

Answer 30. (d)

Question No. 31-35 consists of two statements -Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below: (a) Both (A) and (R) are true and (R) is the correct explanation of (A). (b) Both (A) and (R) are true but (R) is not the correct explanation of (A). (c) (A) is true, but (R) is false. (d) (A) is false, but (R) is true.

31. Assertion (A) : Sodium hydrogen carbonate is used as an ingredient in antacids. Reason (R) : NaHCO3 is a mild non-corrosive basic salt.

Answer 31: (b)

32. Assertion (A): Burning of Natural gas is an endothermic process. Reason (R) : Methane ga combines with oxygen to produce carbon dioxide and water.

Answer 32: (d) 

33. Assertion (A) : Nitrogen is an essential element for plant growth and is taken up by plants in the form of inorganic nitrates or nitrites. Reason (R) : The soil is the nearest and richest source of raw materials like Nitrogen, Phosphorus and other minerals for the plants.

Answer 33: (b)

34. Assertion (A) : Sun appears reddish at the time of Sunrise and Sunset. Reason (R) : Distance travelled by sunlight in the atmosphere is lesser during sunrise and sunset as compared to noon.

Answer 34: (c)

35. Assertion (A): Hydrochloric acid helps in the digestion of food in the stomach. Reason (R) : Hydrochloric acid creates an acidic medium to activate protein digesting enzymes.

Answer 35: (a)

Answer 36: (c)

Answer 37: (b)

Answer 38: (c)

39. If a lens can converge the sun rays at a point 20 cm. away from its optical centre, the power of this lens is — (a) + 2D (b) - 2D (c) + 5D (d) - 51D

Answer 39: (c)

40. The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image? (a) infinity (b) 30 cm (c) Between 16 cm and 30 cm (d) Between 0 cm and 15 cm Answer 40: (d)

41. The length of small intestine in a deer is more as compared to the length of small intestine of a tiger. The reason for this is — (a) Mode of intake of food. (b) Type of food consumed. (c) Presence or absence of villi in intestines. (d) Presence or absence of digestive enzymes Answer 41: (b)

42. Identify the two components of Phloem tissue that help in transportation of food in plants (a) Phloem parenchyma & sieve tubes (b) Sieve tubes & companion cell. (c) Phloem parenchyma & companion cell. (d) Phloem fibres and sieve tubes

Answer 42: (b)

43. A converging lens forms a three times magnified image of an object, which can be take on a screen. If the focal length of the lens is 30 cm, then the distance of the object from the lens is (a) - 55 cm (b) - 50 cm (c) - 45 cm  (d) - 40 cm

Answer 43: (d)

Answer 44: (b)

46. The refractive index of medium A is 1.5 and that of medium B is 1.33. If the speed of light in air is 3 x 108 m/s, what is the speed of light in medium A and B respectively? (a) 2 x 108 m/s and 1.33 x 108 m/s (b) 1.33 x 108 m/s and 2x 108 m/s (c) 2.25 x 108 m/s and 2 x 108 m/s (d) 2 x 108 m/s and 2.25 x 108 m/s

Answer 46: (d) 

47. An object of height 4 cm is kept at a distance of 80 cm from the pole af a diverging mirror. If the focal length of the mirror is 10 cm. the height of the image formed is (a) + 3.0 cm (b) + 2.5 cm (c) + 1.0 cm (d) + 0.75 cm Answer 47: (c) 

Section-C consists of three cases followed by questions.

There are a total of 12 questions (Q. No. 49 to 60) in this section. Attempt any 10 questions from this section. The first attempted 10 question would be evaluated.

Case-I: A student, took four metal P, Q, R and S and earned out different experiments to study the properties of metals. Some of the observations were: • All metals could not be cut with knife except metal R. • Metal P combined with oxygen to form an oxide M2O3 which reacted with both acids and bases. • Reaction with water. P — Did not react either with cold or hot water but reacted with steam Q — Reacted with hot water and the metal started floating R — Reacted violently with cold water. S — Did not react with water at all. Based on the above observations answer the following: 49. Out of the given metals, the one which needs to be stored used Kerosene is (a) P (b) R (c) S (d) Q

Answer: (b) 

50. Out of the given metals, the metal Q is (a) Iron (b) Zinc (c) Potassium (d) Magnesium

Answer: (d) 

51. Metal which forms amphoteric oxides is (a) P (b) Q (c) R (d) S

53. The haemodialyzer has semi-permeable lining of tubes which help to: (a) To maintain osmotic pressure of blood. (b) To filter nitrogenous wastes from the dialyzing solution. (c) In passing the waste product, in the dialyzing solution. (d) To pump purified blood back into the body of the patient.

54. which one of the following is not a function of Artificial Kidney? (a) To remove nitrogenous wastes from the blood. (b) To remove excess fluids from the blood. (c) To reabsorb essential nutrients from the blood. (d) To filter and purify the blood.

55. The 'used dialysing' solution is rich in: (a) Urea and excess salts (b) Blood cells (c) Lymph (d) Proteins

56. Which part of the nephron in human kidney, serves the function of reabsorption of certain substances? (a) Glomerulus (b) Bowmans Capsule (c) Tubules (d) collecting duct

A compound microscope is an instrument which consists of two lenses L1 and L2. The lens L1 called objective, forms a real, inverted and magnified image of the given object. This serves as the object for the second lens L2; the eye piece The eye piece function like a simple microscope or magnifier. It produces the final image, which is inverted with respect to the original object, enlarged and virtual.

57. What types of lenses must be L1 and L2? (a) Both concave (b) Both convex (c) L1 — concave and L2 — convex (d) L1 — convex and L2 — concave

58. What is the value and sign of magnification (according to the new Cartesian sign convention) of the image formed by L1? (a) Value = Less than 1 and Sign = Positive (b) value = More than 1 and Sign = Positive (e) value = Less than 1 and Sign = Negative (d) value = More than 1 and Sign = Negative

59. What is the value and sign of (according to new Cartesian sign convention) magnification of the image formed by L2? (a) value = Less than 1 and Sign = Positive (b) value = More than 1 and Sign = Positive (c) Value = Less than 1 and Sign = Negative (d) Value = More than 1 and Sign = Negative

60. If power of the eyepiece (L2) is 5 diopters and it forms an image at a distance of 80 cm from its optical centre, at what distance should the object be? (a) 12 cm (b) 16 cm (c) 18 cm (d) 20 cm

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CBSE Class 10th Science Question Paper 2021 PDF & Solution

CBSE Class 10th Science Question Paper 2021 PDF: The Central Board of Secondary Education (CBSE) organized the Class 10 Science paper on 02 December 2021 all across the country. The paper was conducted successfully between 11:30 AM and 01:00 PM . Question papers were distributed before 11:30 AM to provide extra 20 minutes to students for reading the paper before they started writing. CBSE Class 10th Science Question Paper 2021 With Solutions PDF is available here to download.

We have already provided you with CBSE Class 10th Social Science Question Paper 2021 PDF . The paper consisted of MCQs only and it was entirely based on the Term 1 syllabus which is 50% of the full syllabus. The paper was balanced, the questions were not at all tough. One who solved NCERT well can expect a good score. The CBSE Class 10 Science Exam 2021 analysis , review, and exam pattern is mentioned below.

Table of Contents

CBSE Class 10th Science Question Paper 2021 PDF: Highlights

CBSE Class 10th Science Paper Exam Analysis 2021

• There is a total of 60 questions . These are divided into three sections .
• Section A has 24 questions. Attempt any 20 questions.
• Section B has 24 questions. Attempt any 20 questions.
• Section C has 12 questions. Attempt any 10 questions.
• All questions carry equal marks .
• There is no negative marking .

Also, Check –  CBSE Class 10th Maths Question Paper 2021 PDF & Answer Key

CBSE Class 10 Term 1 Exam 2021-22 Guidelines

Check the below-given guidelines for CBSE 10th term 1 exams 2021 :

• Reach the exam center at least 30 minutes earlier to avoid the last-minute hassle. Answer sheet distribution will start from 11 am to 11:10 am .
• CBSE Class 10th question paper will be distributed to students from 11:10 to 11:30 am .
• The CBSE 10th exam 2021 will start at 11:30 am and students can start writing their examination.
• OMR sheet will be pre-filled with the details of the candidates.
• The students need to write a Question Paper Code in the space provided in the upper right corner of the sheet. Question Paper Code will be written on the Question Paper.
• Students will have to write in their own hand in the space provided: “I confirm that all particulars given above are correct” and sign in the running hand on OMR.

Download CBSE Class 10th Science Solved Question Paper 2021 PDF

These question papers are being provided by the candidates who have appeared for the CBSE Term 1 Science Paper 2021 . Team Examstocks thanks them for providing their question paper so that It will be helpful for the fellow aspirants to check the answers and question paper. We wish you all the best for the upcoming shifts of the CBSE Class 10th Exams 2021 .

Download CBSE Class 10th Science Question Paper 2021 PDF Set 1

Download class 10th science question paper 2021 pdf set 2, download class 10th science board exam paper 2021 pdf set 3, download class 10th science board exam paper 2021 pdf set 4, cbse class 10th science answer key 2021 pdf.

Here we have shared the CBSE Class 10th Science Paper Answer Key 2021 . However, the official answer key is yet to be released by the board. Check the PDF provided below for Answers to CBSE Class 10th Science Paper Solution 2021 .

Download CBSE Class 10 Science Paper Solution 2021 PDF

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Frequently Asked Questions

Q. What are the exam dates for CBSE Term 1 Exams 2021? Ans. – CBSE will conduct CBSE 10th Board Exams 2021 from 30 November to 11 December 2021.

Q. What type of questions are being asked in CBSE Term 1 Exams 2021? Ans. – The term 1 exams are objective type and students have to mark the correct answers in the OMR sheet.

Q. What is the time duration for CBSE 10th Term 1 Board Exams 2021? Ans. – The CBSE Term 1 exam will be for 90 minutes for each subject.

Q. From where can I download the CBSE Class 10th Science Question Paper 2021 PDF? Ans. – You can download the CBSE Class 10th Science Question Paper 2021 PDF from the link given in the article.

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NCERT Books

Chapter-wise NCERT Textbook Solutions of Class 10 Science PDF Download Free

NCERT Solutions for Class 10 Science PDF links available here are free to view and download on your devices. From CBSE 10th Science NCERT Solutions Chapterwise PDFs, you can discover various solved and unsolved questions and exercises along with sample papers & a list of important questions for every concept. Practicing all these questions and answers from the chapters of physics, chemistry, and biology will aid students to enhance their subject knowledge and secure good grades in the exams.

Free PDF Download of  NCERT Solutions for Class 10 Science English and Hindi Medium

Class 10 NCERT Science Solutions Book is the only guide that covers the complete syllabus with extra knowledge. From this ultimate guide, CBSE students can gain subject skills and utilize them during their final exams for better scores. If you are worried about who has been prepared these NCERT Textbook Solutions for 10th std science can keep their worries aside.

As it is designed by experienced subject teachers as per the latest Class 10 Science CBSE Syllabus. Download the free pdf links of English and Hindi medium 10th science NCERT Book Solutions along with CBSE Class 10 Science book PDF and kickstart your preparation without any hurdles.

• Chemical Reactions and Equations ( रासायनिक अभिक्रियाएँ और समीकरण )
• Acids, Bases and Salts ( अम्ल, क्षार एवं लवण )
• Metals and Non-metals ( धातु और अधातु )
• Carbon and Its Compounds ( कार्बन और इसके यौगिक )
• Periodic Classification of Elements ( तत्वों के आवर्त वर्गीकरण )
• Life Processes ( जैव-प्रक्रम )
• Control and Coordination ( नियंत्रण एवं समन्वय )
• How do Organisms Reproduce? ( जीव जनन कैसे करते है )
• Heredity and Evolution ( अनुवांशिकता एवं जैव विकास )
• Light Reflection and Refraction ( प्रकाश-परावर्तन एवं अपवर्तन )
• Human Eye and Colourful World ( मानव-नेत्र एवं रंगबिरंगी दुनियाँ )
• Electricity ( विद्युत )
• Magnetic Effects of Electric Current ( विद्युत धारा का चुम्बकीय प्रभाव )
• Sources of Energy ( उर्जा के स्रोत )
• Our Environment ( हमारा पर्यावरण )
• Management of Natural Resources ( प्राकृतिक संसाधनों का प्रबंधन )

MCQ Questions for Class 10 Science

Students preparing for the board examination should opt for CBSE Class 10 Science NCERT Solutions PDF and MCQ Questions for 10th Science with Answers PDF Study Resources as they play a crucial role in scoring better marks. So, download Physics, chemistry, biology MCQs with Answers Chapterwise PDFs from the below links & practice daily.

MCQ Questions for Class 10 Science Chemistry with Answers

• Chapter 1 Chemical Reactions and Equations MCQ Questions
• Chapter 2 Acids, Bases, and Salts MCQ Questions
• Chapter 3 Metals and Non-metals MCQ Questions
• Chapter 4 Carbon and Its Compounds MCQ Questions
• Chapter 5 Periodic Classification of Elements MCQ Questions

Biology MCQs For Class 10 Chapter Wise with Answers

• Chapter 6 Life Processes MCQ Questions
• Chapter 7 Control and Coordination MCQ Questions
• Chapter 8 How do Organisms Reproduce? MCQ Questions
• Chapter 9 Heredity and Evolution MCQ Questions
• Chapter 15 Our Environment MCQ Questions
• Chapter 16 Management of Natural Resources MCQ Questions

MCQ Questions for Class 10 Science Physics with Answers

• Chapter 10 Light Reflection and Refraction MCQ Questions
• Chapter 11 Human Eye and Colourful World MCQ Questions
• Chapter 12 Electricity MCQ Questions
• Chapter 13 Magnetic Effects of Electric Current MCQ Questions
• Chapter 14 Sources of Energy MCQ Questions

Along with NCERT Solutions and Multiple choice questions for class 10 science, we would also advise you to study important questions for class 10 Science from the material link dropped here. In the below sections, we are going to discuss each and every chapter covered in NCERT Science Textbook in short.

Class 10 NCERT Science Solutions for Physics Chemistry Biology Chapters Brief

The most important subjects for class 10 pursuing students are Science and Maths. Science plays a vital role in assisting students to select their streams in higher studies. If you are interested in science streams then having a good grip on the fundamentals concepts of science is very important. So, understand the concepts by following the NCERT Solutions for Class 10 Science PDF chapters brief discussed below and score high in exams.

Chapter 1 – Chemical Reactions and Equations (रासायनिक अभिक्रियाएँ और समीकरण )

In class 10 science, the first chapter is introduced with the chemistry concepts that help students to learn deeply about the basics of chemical reactions and equations. From this chapter, you will understand the way of writing chemical equations and balance them, types of chemical reactions, combination reaction, displacement reaction, double displacement reaction, effects of oxidation reactions, corrosion, rancidity.

Chapter 2 – Acids, Bases, and Salts (अम्ल, क्षार एवं लवण )

After getting a good grip on chemical reactions & equations concepts, it’s time to learn what are chemical properties and how they make things taste sour or bitter, their acidic or basic nature, and how substances are used to test this nature.

Moreover, you may acquire perfect knowledge about the importance of pH in everyday life, the pH range of acidic, basic &neutral solutions, and the wide applications of pH scale, chemical formulae, preparation, and chemical reactions of various important salts that are used in day-to-day life from this chapter.

Chapter 3 – Metals and Non-metals (धातु और अधातु )

Metals and Non-metals come under chemistry subject where it provides knowledge about physical properties, chemical properties of different metals and non-metals. Apart from that, you can also learn the reactivity of metals with non-metals and the properties of ionic compounds.

Chapter 4 – Carbon and Its Compounds (कार्बन और इसके यौगिक )

NCERT Class 10 Science Solutions of Chapter 4 deals with organic chemistry. Also, the chapter is about Carbon which is a versatile element found in many organic and inorganic compounds. Furthermore, you will learn the concepts like Covalent bonds in carbon, compounds derived from carbon, versatile nature, chemical properties of carbon, properties of Ethanol and Ethanoic acid, soaps, and detergents & their cleansing actions in this chapter.

Chapter 5 – Periodic Classification of Elements (तत्वों के आवर्त वर्गीकरण )

Have you ever wondered how the periodic table formed? If yes, then look at this chapter and learn how scientists classified elements based on their properties and organized them into the modern periodic table. Some of the major topics explained here are Döbereiner’s Triads, Newlands’ Law of Octaves and their limitations, trends in atomic size, valency, and physical & chemical properties of elements across the Modern Periodic Table.

Chapter 6 – Life Processes (जैव-प्रक्रम )

NCERT Solutions For Class 10 Science Chapter 6 Life Processes covers the discussion and explanation of various biological processes and reactions taking place in organisms. Apart from this, you will also learn a few major topics like What are Life Process?, Nutrition in Organisms: Autotrophic and Heterotrophic Nutrition, How do organisms obtain their nutrition, Nutrition in human beings: Respiration, Transportation & Excretion, Excretion in human beings and Plants in this chapter.

Chapter 7 – Control and Coordination (नियंत्रण एवं समन्वय )

In chapter 7 NCERT Solutions, kids will get the basic knowledge about the nervous system of human beings, an explanation about the anatomy of the Human Brain, coordination in plants, and hormones in animals.

Chapter 8 – How do Organisms Reproduce? (जीव जनन कैसे करते है )

Biology chapters can be very interesting for students to learn as they explain various modes of reproduction, including asexual and sexual reproductions, advanced types of reproduction, and diverse processes of reproduction.

Chapter 9 – Heredity and Evolution (अनुवांशिकता एवं जैव विकास )

One more biology chapter in NCERT Science solutions of class 10 is Heredity and Evolution. It completely deals with the passing of genes between different generations, details about the process of sex determination, Charles Darwin Theory to get familiar with the concept of Evolution, and many more.

Chapter 10 – Light Reflection and Refraction (प्रकाश-परावर्तन एवं अपवर्तन )

NCERT Solutions for class 10 science chapter 10 Light Reflection and Refraction illustrates the theories of reflection and refraction of light. Moreover, you will get a deeper knowledge about Image formation by plane mirror/curved mirrors and lenses. From this chapter, you can also get the knowledge about a few important topics such as:

• Reflection of light
• Power of Lens
• Image formation by spherical lenses
• Image formation by spherical mirrors
• Mirror formula and magnification
• Sign convention for reflection by spherical mirrors
• Refraction of Light
• Refraction through a rectangular glass slab
• Refractive index
• Refraction by spherical lenses
• Sign Convention for refraction by spherical lenses
• Lens Formula and Magnification

Chapter 11 – Human Eye and Colourful World (मानव-नेत्र एवं रंगबिरंगी दुनियाँ )

This chapter entirely focuses on the human eye structure and the functions which are involved in every single part of the eye. Some other concepts like various eye defects such as myopia, hypermetropia, refraction through a prism, depression of white light by a glass prism, refraction through the atmosphere, Tyndall effect, and Scattering of light are explained here as it helps students to understand how to cure people eye problems in their life.

Chapter 12 – Electricity (विद्युत )

Chapter 12 deals all about Electricity which we use in our day-to-day life. Having a better grip on all electricity concepts helps you understand the problems that you face in real life. Here in this chapter, you will learn the concepts of electric current, circuit diagram, potential difference, resistance, the combination of resistance, heating effects of current and electrical power, constituents of electricity, current flow in an electrical circuit, Ohm’s law, resistivity, Joule’s law, electric fuse, electric power.

Chapter 13 – Magnetic Effects of Electric Current (विद्युत धारा का चुम्बकीय प्रभाव )

Studying the magnetic effects of electric current is more important for students to know that Electricity and Magnetism are related phenomena. Practical applications – electromagnets, electric motor (magnetic effect of electric current), and electric generators (electric effect of moving magnets) are some of the important topics explained deeply in this chapter.

Chapter 14 – Sources of Energy (उर्जा के स्रोत )

NCERT Class 10 Science Chapter 14 Sources of Energy Solutions are explained here. The major concepts included in this chapter are as follows:

• Ideal source of energy
• Non-Conventional Sources of Energy: Solar Energy, Energy from Sea, Geothermal Energy, Nuclear Energy
• Conventional sources of energy: Fossil fuels, thermal power plants, hydro-power plants
• Renewable and non-renewable sources of energy and their availability in the long run
• Bio-Mass and wind energy as major energy resources

On the other hand, this chapter also explains different forms of energy and their sources

Chapter 15 – Our Environment (हमारा पर्यावरण )

Knowledge about the environment that we live in is a must for all human beings not only students. So, this chapter completely deals with the importance of preserving the environment, ecosystem and its components, food chain, food web, waste management, biodegradable and non-biodegradable substances, a tropic level, biotic and abiotic components, producers, consumers, ozone formations & its depletion. Besides, the chapter also explains how to manage the garbage that humans produce

Chapter 16 – Management of Natural Resources (प्राकृतिक संसाधनों का प्रबंधन)

NCERT Solutions for class 10 science chapter 16 Sustainable Management of Natural Resources covers detailed information about different natural resources, their advantages, and conservation efforts. But, primarily the chapter concentrates on the following concepts:

• Management of forests and wild-life
• Management of fossil fuels; Coal and Petroleum
• Natural resources and their management
• Water harvesting

Unit-Wise Marking Scheme of CBSE Class 10 Science Term 2 Exam (Theory)

The unit-wise marks weightage list provided here is completely based on the latest CBSE Class 10 Science exam paper:

FAQs on CBSE Class 10 Physics Chemistry Biology NCERT Solutions PDF

1. How students can find Solutions for NCERT 10th Science exercises questions online?

Students can find all chapters of NCERT solutions for class 10 science exercise questions online at NCERTBooks.Guru

2. How many chapters & what are there in the 10th NCERT Solutions Science?

NCERTBooks.Guru provided NCERT Solutions for Class 10 Science cover all the 16 textbook chapters. The list of all the chapters covered in the solutions of NCERT 10th std science are as follows:

• Chemical Reactions and Equations
• Acids, Bases, and Salts
• Metals and Non-metals
• Carbon and its Compounds
• Periodic Classification of Elements
• Life Processes
• Control and Coordination
• How do Organisms Reproduce?
• Heredity and Evolution
• Light – Reflection and Refraction
• The Human Eye and the Colorful World
• Electricity
• Magnetic Effects of Electric Current
• Sources of Energy
• Our Environment
• Sustainable Management of Natural Resources

3. Will NCERT 10th Class Solutions for Science PDFs be enough to score well in the board exam?

Yes, NCERT 10th Class Solutions for Science PDFs are enough to score high in the board exam. As it covers all chapters textbook and exercise questions with detailed solutions that clear all your doubts and improves your subject knowledge.

Students of Class 10 may also refer to the study materials like NCERT Class 10 Science Exemplar, NCERT Textbooks , NCERT 10th Science Syllabus as well as NCERT Solutions for Class 10 Science PDF at NCERTbooks.Guru for better preparation for exams. We believe this article has been helpful to you. If you have any questions, ask in the comment section below and we will get back to you at the earliest.

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Kalvikavi - Educational Website - Question Paper

Important Questions, pdf Download public exam Question, Quarterly Question paper, model Question paper, Discover essential study materials, model question papers, and daily educational news for grades 6-12. Get tips and plans for public exam success!

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August 11, 2021

10th social science assignment answer key 2021 - unit-1 history.

• Subject: Social Science | History 
• Unit 1 - 
• 10th Social science assignment unit 1 - PDF Download -TM

Part- A  

I. 1 Mark Questions :        

3. What were the three major empires shattered by the end of First World War?

(a) Germany, Austria Hungary, and the Ottomans

(b) Germany, Austria-Hungary, and Russia

(c) Spain, Portugal and Italy

(d) Germany, Austria-Hungary, Italy

5. Who said “imperialism is the highest stage of capitalism”?

(c) Sun Yat-sen

(d) Mao Tsetung

II Very Short Answers

6. Name the countries in the Triple Entente.

• Britain, France and Russia.

7. What were the three militant forms of nationalism in Europe?

• The three militant forms of nationalism were, England’s Jingoism, France’s Chauvinism and Germany’s Kultur.
• Trench warfare is a type of land warfare using occupied fighting lines consisting largely of military trenches, in which troops are well-protected from the enemy’s small arms fire and are substantially sheltered from artillery. It is a warfare in which opposing armed forces attack, counterattack, and defend from relatively permanent systems of trenches dug in the ground.

  Part - c 

Iii short answers.

9. Discuss the main causes of the First World War.

• The causes of the First World War are given below:
• Formation of European alliances and counter alliances
• Emergence of violent forms of nationalism in countries like England, France and Germany
• Aggressive attitude of the German Emperor Kaiser Wilhelm II
• Hostility of France towards Germany
• Opportunity for imperial power politics in the Balkans
• The Balkans wars
• Immediate cause which included the assassination of Archduke Franz Ferdinand, nephew and heir to Franz Joseph, Emperor of Austria-Hungary, by Princip, a Bosnian Serb, on 28 June 1914.

10. Explain the course of the Russian Revolution under the leadership of Lenin.

• Lenin was in Switzerland when the revolution broke out in Russia. He wanted to continued revolution.
• His slogan of “All power to the Soviets” soon won over the workers’ leaders. Devastated by war time shortages, the people were attracted by the slogan of ‘Bread, Peace and Land’.
• In October Lenin persuaded the Bolshevik Central Committee to decide on immediate revolution. Trotsky prepared a detailed plan
• On 7 November the key government buildings, including the Winter Palace, the Prime Minister’s headquarters, were seized by armed factory workers and revolutionary troops
• On 8 November 1917a new Communist government was in office in Russia. Its head this time was Lenin. The Bolshevik Party was renamed the Russian Communist Party.

 IV Answer The Following in Detail

12. Highlight the provisions of the Treaty of Versailles relating to Germany.

• All the central powers were directed to pay war indemnity especially Germany was to pay heavy amount for the losses suffered.
• Germany had to pay 6,600 million pounds as per the Reparation Commission, but can be paid in installments.
• The Germans should not have submarines and airforce, but can have a small navy and an army of one lakh men.
• Austria and Germany separated and Austria was given independence.
• All German colonies came under the mandated territories of League of nations.
• Germany had to give up all her overseas possessions, rights and titles to the allies.
• Germany surrendered Alsace-Lorraine to France.
• She signed the Treaty of Brest-Litovsk with Russia and the treaty of Bucharest with Bulgaria.
• Rhineland was to be occupied by the allies. East of Rhineland area was to be demilitarised.
• Poland was recreated with a corridor to Baltic containing the port of Danzig of Germany. 

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11. question map kodunga

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Bonding & Lewis Diagram Assignment

Description

This product contains an assignment on bonding and Lewis structures and an accompanying answer key.

Zip File includes:

• Bonding & Lewis Diagrams Worksheet - Word Document, 4 pages
• Accompanying Answer Key - Word Document, 4 pages
• Links to Google Document versions of each
• Teacher notes - PDF, 1 page

Assignment covers:

- Atomic radii

- Lewis structures of small and large uncharged molecules

- Lewis structures of polyatomic ions (including formal charges)

- Questions to get students thinking about the underlying theories (electronegativity, electron configuration)

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