Question

Classify the following as physical and chemical changes:
(i) Cleaning with soap and water
(ii) Cooking chicken
(iii) Formation of clouds
(iv) Making of ice cubes

• A. Physical change - (i), (iv); chemical change - (ii) & (iii)
• B. Physical change - (iii), (iv); chemical change - (i) & (ii)
• C. Physical change - (i), (ii); chemical change - (iii), (iv)
• D. Physical change - (i), (iii); chemical change - (ii), (iv)

Answer 1

The correct option is B

Physical change - (iii), (iv); chemical change - (i) & (ii)

In a physical change, there is no change in the chemical composition of a substance, whereas, in a chemical change, the chemical nature of the substance changes because of formation of a new substance.
So, physical changes:
Formation of clouds
Making of ice cubes
And, chemical change:
Cleaning with soap and water, & Cooking chicken