Question

Which  one of the following is a physical change?



a) Rusting of iron

(b) Combustion of magnesium ribbon

(c) Burning of candle

(d) Melting of wax

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Answer 1

Explanation:

d) Melting of wax

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Answer 2

(i) Melting of iron metal, (iii) Bending of an iron rod and (iv) Drawing    a wire of iron metal are physical changes, because in three processes, iron changes its form,not the chemical composition. In rusting of iron, its chemical composition is changed.