🧪 NCERT Class 10 MCQ Quiz Hub

1. MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations
Boiling of water to give water vapour.
Melting of ice to give water.
Dissolution of salt in water.
Combustion of Liquefied Petroleum Gas (LPG).

2. Strong heating of ferrous sulphate leads to the formation of a brown solid and two gases. This reaction can be categorised as:
displacement and redox.
decomposition and redox
displacement and endothermic
decomposition and exothermic.

3. Which among the following is (are) double displacement reaction(s)? (I) Pb + CuCl2 → PbCl2 + Cu (II) Na2SO4 + BaCl2 → BaSO4 + 2NaCl (III) C + O2 → CO2 (IV) CH4 + 2O2 → CO2 + 2H2O
(I) and (IV)
Only (II)
(I) and (II)
(III) and (IV)

4. When copper turnings are added to silver nitrate solution, a blue coloured solution is formed after some time. It is because copper: (I) Displaces silver from the solution (II) forms a blue coloured complex with AgNO3 (III) Is oxidized to Cu2+ (IV) ls reduced to Cu2+
(I) and (II)
(II) and (III)
(I) and (III)
(II) and (IV)

5. One of the following does not happen during a chemical reaction. This is:
Breaking of old bonds and formation of new bonds
Formation of new substances with entirely different properties
Atoms of one element change into those of another element to form new products
A rearrangement of atoms takes place to form new products

6. You are given the solution of lead nitrate. In order to obtain a yellow precipitate, you should mix with it a solution of:
potassium chloride
potassium nitride
potassium sulphide
potassium iodide