Question

Which of the following are physical changes ?

(i) melting of iron metal (ii) rusting of iron metal

(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

(c) Options (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.