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 provided in this article. Some of the important topics in Chemical reactions and equations chapter include:

  1. Balanced Chemical Equations
  2. Decomposition Reactions
  3. Displacement Reactions
  4. Oxidation and Reduction
  5. Corrosion
  6. Rancidity

Expected no of questions: 2 to 3 questions of total 5 marks

Download PDF: NCERT Solutions for Class 10 Science Chapter 1 pdf


NCERT Solutions for Class 10 Science Chapter 1

NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations is given below.

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NCERT Solutions for Class 10 Science

 A chemical reaction is in which the bonds are broken within reactant molecules, and new bonds are formed within product molecules in order to form a new substance. A chemical equation is nothing but a mathematical statement which symbolizes the product formation from reactants.

Types of Chemical Reaction are as follows.

Decomposition Reaction: A decomposition reaction is a reaction that takes place when one reactant breaks down into two or more simpler substances.

Displacement Reaction: A displacement reaction occurs where an atom or a group of atoms is replaced by another atom. 

Oxidation Reaction: Oxidation is defined as the loss of electrons or an increase in the oxidation state of an ion, atom, or certain atoms in a molecule. It is also described as a reaction where an element combines with oxygen.

Reduction Reaction: Reduction is defined as the gain of electrons or a decrease in the oxidation state of an ion, atom, or certain atoms in a molecule. 

Corrosion is the process by where when metals react with moisture, saltwater, acid or any other substance for a long period of time, oxidation reaction occurs and metals loses their strength and get corroded. A layer of oxide of the metal forms on the surface of the metal. This layer is called as rust.

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CBSE X Related Questions

  • 1.
    State two differences between the act of chewing food and salivation on sight of food.


      • 2.
        Paddy fields require a large amount of water. The pesticides and chemical fertilizers used are washed down into the soil or waterbodies. How do these chemicals reach our bodies? What is this phenomenon known as?


          • 3.
            In human beings, the implantation of fertilised egg takes place in which part of female reproductive system?

              • Oviduct
              • Cervix
              • Uterus
              • Vagina

            • 4.
              Assertion (A): Reflex actions do not involve thinking.
              Reason (R): Most reflex actions are controlled by the spinal cord.

                • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
                • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
                • Assertion (A) is true, but Reason (R) is false.
                • Assertion (A) is false, but Reason (R) is true.

              • 5.
                The pattern of magnetic field due to a current carrying wire depends upon the shape made by that wire. Justify.


                  • 6.
                    Which of the following set of compounds does not belong to same homologous series?

                      • CH$_4$ and C$_4$H$_{10}$
                      • C$_2$H$_6$ and C$_3$H$_8$
                      • C$_3$H$_8$ and C$_5$H$_{12}$
                      • C$_4$H$_8$ and C$_5$H$_{12}$

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