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.
Why does the sky appear dark instead of blue to an astronaut?

      2.

      A milkman adds a very small amount of baking soda to fresh milk.
      (a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?
      (b) Why does this milk take a long time to set as curd?

          3.
          Balance the following chemical equations.
          (a) HNO3 +Ca(OH)2 \(→\) Ca(NO3)2 + H2
          (b) NaOH + H2SO4 \(→\) Na2SO4 + H2
          (c) NaCl + AgNO3 \(→\) AgCl + NaNO3 
          (d) BaCl + H2 SO4 \(→\) BaSO4 + HCl

              4.
              Explain the following terms with one example each. 
              (a) Corrosion 
              (b) Rancidity

                  5.
                  Which of the statements about the reaction below are incorrect?
                  \(\text{ 2PbO(s) + C(s) → 2Pb(s) + C}O_2\text{(g)}\)
                  (a) Lead is getting reduced. 
                  (b) Carbon dioxide is getting oxidized. 
                  (c) Carbon is getting oxidized. 
                  (d) Lead oxide is getting reduced.

                    • (a) and (b)

                    • (a) and (c)

                    • (a), (b) and (c)
                    • all

                    6.

                    How are fats digested in our bodies? Where does this process take place?

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