NCERT Solutions for Class 10 Science Chapter 1 – Chemical Reactions and Equations
NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations are carefully drafted by the Science experts. This chapter tells you about the types of common chemical reactions and their examples. This also tells you how to write and balance chemical reactions. The reaction types covered in this chapter are combination, decomposition, displacement, and reduction reactions. Oxidation reactions encountered in daily life situations are also mentioned in this chapter of CBSE NCERT Solutions for Class 10 Science book.
There are a total of 20 questions asked at the end of the chapter covering all the concepts taught in NCERT CBSE Class 10 Science Chapter 1. The questions given in the chapter enable you to practice the techniques of writing and balancing equations. They strengthen your knowledge of different types of chemical reactions and help you relate daily life situations with common chemical reactions.
All of these questions are answered in a detailed manner in Chapter 1 Chemical Reactions and Equations. They follow all the guidelines given by CBSE and NCERT. The solutions are written in a comprehensive manner covering all topics of the chapter. However, these are precise solutions that help you learn effectively.
NCERT Class 10 Science Chapter 1: Important Topics
NCERT Solutions for Class 12 Science Chapter 1 Chemical Reactions and Equations cover all the important concepts of the unit. They give you an in-depth understanding of the different concepts. Some concepts covered in this chapter have been given below.
- Chemical Equations
This portion of the chapter tells you that chemical equations are the means to provide the details of a chemical reaction in a systematic way. It does so through various detailed examples.
- Writing a Chemical Equation
Class 10 Science Chemical Reactions and Equations teaches you to write a chemical equation by mentioning the reactants, product conditions of reactions and the physical states of the reactants and products.
- Balanced Chemical Equations
You learn here that chemical equations must always be balanced and for equality of all the atoms of each type involved in a reaction, on both sides of the equation.
- Types of chemical reactions
CBSE NCERT Class 10 Science Chapter 1 tells you about the main types of reactions responsible for major chemical processes. Some of them have been given below.
- Combination Reaction
This portion of the chapter tells you that combination reactions are the ones where two substances or more than that combine with each other chemically providing a new substance called product. One of the common examples is the formation of water from hydrogen and oxygen elements. The same has been represented below.
2H2(g) + O2(g) → 2H2O(l)
- Exothermic Reactions and Endothermic Reactions
This part of the chapter further tells you that the reactions which give out energy, mostly in the form of heat, are known as exothermic reactions, and the opposite reactions are known as endothermic reactions. Burning of coal and the respiration process are examples of the exothermic process.
- Decomposition Reactions
This part of the chapter tells you that decomposition reactions are those where one reactant breaks down to give two or more than two products. An example of a decomposition reaction is the thermal decomposition of calcium carbonate to yield calcium oxide and carbon dioxide. The representation of the same has been given below
It also tells you that in general, decomposition reactions need energy like heat, light or electricity for breaking down the reactants. Some decomposition reactions take place in the presence of sunlight also. Decomposition reactions are thus, endothermic reactions.
- Displacement Reactions
This part of the chapter teaches you that displacement reaction is said to take place when an element displaces another element from its compound, such as replacement of copper in its solution by lead. The representation of the same has been given below.
- Double Displacement Reactions
This portion of the chapter also informs you that two different atoms or groups of atoms (ions) are exchanged in double displacement reactions.
- Precipitation Reactions
Precipitation reactions are those where one of the products comes out of the solution being insoluble in it.
- Oxidation Reactions and Reduction Reactions
You learn in this part of the chapter that some chemical reactions comprise of gain or loss of oxygen or hydrogen. In case of gain of oxygen or loss of hydrogen, the reaction is known as oxidation reaction, and reduction reaction is when there is a loss of oxygen or gain of hydrogen.
- Corrosion and Rancidity
This portion of the chapter talks about corrosion and rancidity and how these are the oxidation reactions that take place in daily life instances.
CBSE NCERT Class 10 Science Chapter 1 Exercise
Our NCERT Solutions for Class 10 Science Chapter 1 – Chemical Reactions and Equations comprise a total of 20 questions that cover all important concepts of the chapter. They help you learn the chapter thoroughly. The components of the exercise have been listed below.
- Questions 1 to 3 is multiple-choice questions based upon the types of reactions learnt in the chapter.
- Questions 4 to 8 ask you to balance the given equations by asking you to first write an equation using the given information and then balance it. These questions let you practice the technique of writing and balancing equations thoroughly.
- Questions 9 and 10 test your knowledge of heat exchange involved in chemical reactions. They ask you whether the chemical reaction is exothermic or endothermic.
- Question 11 given in NCERT CBSE Class 10 Science Chapter 1 asks you to compare and contrast the features of combination and decomposition reactions.
- Question 12 asks you to provide a few decomposition reactions where energy is supplied in the form of heat, light or electricity.
- Question 13 is a differential question that asks you to cite the difference between displacement and double displacement reactions.
- Question 14 asks you to write the chemical equation involved in the refining of silver.
- Question 15 is a direct question about the precipitation reaction concept.
- Question 16 is a direct question based on the concepts of oxidation and reduction reactions.
- Question 17 is an application-based question on the chemical reaction.
- Questions 18 to 20 are based on corrosion, rancidity and their prevention.
Benefits of NCERT Solutions for Class 10th Science Chapter 1 – Chemical Reactions and Equations
Some of the crucial benefits of learning and revising from NCERT Solutions for Class 10 Science Chapter 1-Chemical Reactions and Equations have been cited below.
- They deal with the basic information about chemical reactions and their depiction through an equation. This helps you become thorough with all-important fundamental concepts
- They are to the point, fully accurate and facilitate speedy and effective learning.
- The solutions given provide a comprehensive outlook of the topic covered in the chapter preparing you best for class 10th board exams.
- They make learning fun, fascinating and a highly efficient process.
- They are critical in laying the right foundation of Science subjects so that learning more complex topics becomes easy in higher classes.
These solutions help you to appear for class 10th board exams confidently and score good marks.