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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)

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B

(i), (ii) and (iv)

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C

(i), (iii) and (iv)

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D

(ii), (iii) and (iv)

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Solution

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.


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