Question

Which of the following are physical changes?

(i) Melting of iron metal

(ii) Rusting of iron

(iii) Bending of an iron rod

(iv) Drawing a wire of iron metal

• A. (i), (ii) and (iii)
• B. (i), (ii) and (iv)
• C. (i), (iii) and (iv)
• D. (ii), (iii) and (iv)

Answer 1

The correct option is C

(i), (iii) and (iv)

Explanation for correct option:

Physical change:

• “A change in which a substance undergoes a change in its physical properties is called a physical change.”
• The physical changes are reversible in nature.
• Examples of physical changes are the precipitation of rain and snow as well as ice melting.

(i) Melting of iron metal, (iii) Bending of an iron rod, and (iv) Drawing a wire of iron metal are examples of physical changes are they can be reversed.

Explanation for incorrect options:

(ii)

While Rusting of iron is a chemical change as it is irreversible in nature.

Rusting of iron is a chemical change. Thus, options A, B, and D are incorrect.

Hence, the correct option is C.