What are the Most Important Topics of Class 10 Science? PDF Download

Knowing the important topics can be really helpful in your Class 10 science Preparation. If you know important topics while studying the syllabus for the first time or revising it, you can focus more on them and take your preparation up by a notch. In this document, EduRev has compiled a list of important topics of science Class 10 after careful analysis of past year papers.

Chapter Wise Important Topics of Class 10 Science

• Chemical Reactions and Equations: When it comes to the first chapter of chemistry, topics such as types of chemical reactions and oxidation and reduction are commonly discussed. It is more important to focus on activities related to chemistry than those related to physics. Corrosion and rancidity should not be overlooked either.
• Acids, bases and salts: The most common topics from this chapter are related to PH and the formation of sodium hydroxide. The questions regarding indicators and activities should be read properly. The topic of salts is also important. 
• Metals and Non-Metals: The most frequently discussed topic from this chapter tends to be the extraction of metals. Relevant activities such as the reaction of metals with acids or the corrosion of metals should be given special attention. Additionally, the reactivity series is a very important concept to focus on.
• Carbon and its compounds: The nomenclature of carbon compounds, physical properties of carbon compounds especially their low melting and boiling points, saturated and unsaturated hydrocarbons and ethanol and ethanoic acid are important topics of this chapter. Esterification and saponification should not be ignored.
• Although in biology not a lot of topics are repeated, here are some of the topics that are commonly asked in the exam 
• Life Processes: From this chapter, excretion is a repetitive topic, especially questions related to urine. Transportation in plants is another important topic. Questions regarding the experiment “Preparing a temporary mount of a leaf peel to show stomata” were repeated over multiple years. Other topics such as respiration, the circulatory system should not be ignored. Focus on diagrams in this chapter.
• Control and Coordination: Movement in plants and the endocrine system are important topics. 
• How do organisms reproduce?: Asexual reproduction, the structure of flowers, pollination in plants, and contraceptives demand extra focus. Other topics like male and female reproductive parts should not be ignored.
• Heredity and Evolution: Questions regarding Mendel's progeny are some of the repetitive questions from this chapter. Mostly conceptual questions are asked. The example of conceptual questions are:
  Question 1: How are variations useful for species if there is drastic alteration in the niches? (sample paper 2023)
  Question 2: Define genetics. Why is a decrease in the number of surviving tigers a cause of concern from the point of genetics? Explain briefly. (CBSE 2019)
• Light Reflection and Refraction: The most important topics of this chapter are image formation and numerical questions based on the mirror formula and lens formula. Sometimes easy theoretical topics like laws of reflection or refraction are also asked. 
• The human eye and the colourful world: Questions are asked related to prisms or related to defects of the eyes. Many questions were asked related to the colour at sunrise or sunset but it is not a part of the syllabus for 2022-2023.
• Electricity: Numericals are definitely asked related to the circuit diagram in which different components such as voltage or resistance are given and it is asked to find the current. The definition of Joule’s Law of Heating is a repetitive question too. Another important topic is resistance and the factors affecting it.
• Magnetic Effects of Electric Current: One of the most important topics of this chapter is magnetic field lines - their properties and their diagrams. Another repetitive question is related to the electric motor but it is not included in the syllabus this time. Another topic is the force on a conductor.
• Our Environment: This chapter is of 5 marks and it is quite easy. It has mainly three topics: Ozone, Food Chain and Garbage Disposal.
• Importance of Practicals: There are a total of 14 practicals in class 10. Questions are asked from these practicals in the exam. Therefore it is important to read these practicals in detail such as the steps involved, materials required, objective and conclusion. Following some questions based on practicals are given which were asked in previous exams. 

  Question 1: Anita added a drop each of diluted acetic acid and diluted hydrochloric acid on pH paper and compared the colours. Which of the following is the correct conclusion? (CBSE - 2023 sample paper)

  (a) pH of acetic acid is more than that of hydrochloric acid. 

  (b) pH of acetic acid is less than that of hydrochloric acid. 

  (c) Acetic acid dissociates completely in an aqueous solution. 

  (d) Acetic acid is a strong acid

  Question 2: List the steps of preparation of temporary mount of a leaf peel to observe stomata. (CBSE - 2018)

  Question 3: A student observed a permanent slide showing asexual reproduction in Hydra. Draw labelled diagram in proper sequence of the observations that must have been made by the student. Name the process of reproduction. (CBSE - 2019)

The EduRev course "How to Prepare for Class 10" provides comprehensive and detailed guidance on how to prepare for the Class 10 board exam. It covers topics such as syllabus, study material, tips and tricks and more. The course also provides guidance on how to approach the exam and make effective use of the available resources. The course is highly recommended for students who wish to prepare for the Class 10 board exam in the best way possible. 

Preparation tips for CBSE Class 10 Science

1. To prepare for the CBSE Class 10th board exams, it is important to thoroughly read the NCERT science books, as the question papers are often based on these texts. 
2. Additionally, going through past years' question papers can be helpful as questions are frequently repeated. 
3. After completing the curriculum, it is important to regularly revise all subjects to avoid issues with recalling information the day before the exam. 
4. On the day of the exam, it is best not to study any new material and instead focus on reviewing and memorizing key information. 
5. Utilizing different study methods, such as flashcards or mind maps, can be helpful. 
6. It is also important to take breaks and maintain a healthy diet, as well as getting adequate sleep before the exam. 
7. Creating a study schedule and sticking to it can help ensure that you complete the syllabus on time. During the exam, make sure to write neatly and readably, and start with the simpler questions before moving on to more difficult ones. 
8. It is also important to keep an eye on the time, as the theoretical paper has a limited time of three hours. To prepare for this, practice answering sample question papers within a three-hour time limit.

Preparation Strategy for Physics

To effectively learn physics, it is helpful to divide the process into two stages: understanding the concepts and applying them to solve numericals. It is important to be familiar with formulas from various chapters, as numericals are mostly asked from the physics section of the Class 10 science Exam. Diagrams related to reflection, refraction, magnetic field lines should be practised properly.

Preparation Strategy for Biology

Class 10 biology is particularly interesting because it focuses on the physiology of humans. It is likely that questions on exams will be drawn from all parts of the NCERT textbook. It is important for students to be able to create clear, well-labeled diagrams, as they are a crucial part of understanding the material. To fully grasp the concepts, activities, and experiments in the chapters, it is recommended to thoroughly read and review the Biology NCERT multiple times.

Preparation Strategy for Chemistry

There are four chapters in chemistry that focus on chemical reactions and equations and should be thoroughly studied. Properly study the activities given in this chapter. The chapters acids, bases and salts, metals and non-metals and carbon and its compounds are also important chapters so pay special attention to important topics from these chapters.  It is also necessary to ensure that chemical equations are properly balanced and detail chemical reactions when one substance converts to another.

CBSE Class 10 Science Syllabus 2022-23

The topic-wise marks distribution and weightage of CBSE Class 10 Science are given below:

The deleted syllabus of Class 10 Science is mentioned below:

CBSE Class 10 Science Important Topics: Reference Books

• Science-Textbook for class IX-NCERT Publication
• Science-Text book for class X- NCERT Publication
• Assessment of Practical Skills in Science-Class IX – CBSE Publication
• Assessment of Practical Skills in Science- Class X- CBSE Publication
• Laboratory Manual-Science-Class IX, NCERT Publication
• Laboratory Manual-Science-Class X, NCERT Publication
• Exemplar Problems Class IX – NCERT Publication
• Exemplar Problems Class X – NCERT Publication

How will EduRev help you prepare for Class 10 Science?

EduRev Infinity Package for Class 10 includes: 

1. Subject-wise Courses: Courses for all the compulsory subjects: Science, Mathematics, Social Science, English and Hindi. Each course offers topic-wise video lectures, detailed notes & online tests for each topic. 
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3. Sample Papers: EduRev has all the latest sample papers with the latest exam pattern. These sample papers are excellent for practising according to the latest syllabus and exam pattern.
4. Past Year Papers: EduRev offers past year papers for Class 10 for subjects English, Science, Social Science, Mathematics and Hindi. The past years' papers are available of last 10 years. 
5. RD Sharma and Lakhmir Singh and Manjit Kaur Solutions: Solutions to reference books RD Sharma and Lakhmir Singh and Manjit Kaur are available at EduRev. These books are helpful in practising different types of questions.
6. Revision Notes for all Subjects: EduRev provides chapter notes for Class 10 students. It covers topics from various subjects such as Mathematics, Science, Social Science, English, etc. The notes are concise and well-structured, which makes it easier for students to find the information they need quickly. 
7. Crash Course for Class 10: EduRev's Crash Course for Class 10 is an online course that provides a comprehensive overview of important topics for students preparing for their Class 10 examinations. The course covers topics from Mathematics, Science, Social Science, English and Hindi. It includes video lectures and practice questions that are designed to help students understand the concepts better and apply them in their exam preparation.

Frequently Asked Questions (FAQs) on Most Important Topics of Class 10 Science

Is it difficult to score more than 90 in the board exams of Class 10?

No, it is not difficult for you to score more than 90 per cent in your board exams. However, if you are not thorough with the concepts, answering the easy questions also becomes a tough job. To master the topics in the syllabus, you should first make a routine, where you give sufficient time to each subject. You should study all the chapters and mark all the important concepts and revise them regularly. Apart from this, you should also be thorough with all the important topics provided by EduRev. Following the steps given in the guide Class 10 Guide by National Toppers: 8 Steps to Score 95% above will ensure that you leave no stones unturned to score above 90 in Class 10 exams.

Do questions come from the lab manual in Class 10 CBSE 2023 science exam?

Yes, questions come from 14 experiments that are given in the lab manual. Study the steps involved, materials used, conclusion etc related to the experiments as questions are asked related to these topics.  EduRev also provides Lab Manuals for Science, click here.

How many hours should I study to become a topper?

Being a topper doesn’t mean that you have to study for 7-8 hours. It is about consistency. Learn new concepts everyday and practise questions related to those concepts. Plan your day and make sure to achieve your goals for the day.

What tips should I use while answering the Class 10 Science exam?

Here are a few tips that may help you perform well on the Class 10 Science Exam:

1. Read the instructions and questions carefully: Make sure you understand what is being asked of you before you start answering. Look out for key words such as "define," "explain," "compare," and "contrast," as they indicate the type of response that is expected. Note the units and numbers properly in numerical questions.
2. Plan your answer: Before you start writing, take a few minutes to think about what you want to say and how you will present your ideas. This can help you organise your thoughts and structure your answer in a clear and logical way.
3. Use clear and concise language: Write your answer in points and highlight the key points in your answer too. Remember that marks are given for steps. The answers should be written in clear handwriting.
4. Draw diagrams to explain your answer: Draw a diagram to explain a concept where time permits. The diagrams should be neat and properly labelled. Review your work: After you have finished writing, take a few minutes to review your work. Check for spelling and grammar errors, and make sure that your answer is clear and well-organised.
5. Don’t change the answer until sure: Do not change the answers unless you are 100% sure. Most of the time the first answer that you think is the correct answer.
6. Answer Easy Questions First: Answer the easy questions first to build up your confidence and then tackle the more difficult ones.
7. Don't Spend Too Much Time on a Question: f you get stuck on a question, do not spend too much time on it. Leave it and you can get back to it at the end of the exam.