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Question
Which of the following statements are the characteristics of a physical change?
(i) The state of the substance may or may not change.
(ii) A substance with different properties is formed.
(iii) No new substance is formed.
(iv) The substance undergoes a chemical reaction.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) and (iv)
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Answer
The correct option is
(c) (i) and (iii)
.
- (i) The state may or may not change — TRUE : Some physical changes involve a state change (ice → water), others don't (folding paper).
- (ii) A substance with different properties is formed — FALSE : That describes a chemical change, not physical.
- (iii) No new substance is formed — TRUE : This is the defining feature of a physical change.
- (iv) Undergoes a chemical reaction — FALSE : Chemical reactions belong to chemical changes.
Statements (i) and (iii) together capture exactly what a physical change is.
