Q. 25.0( 3 Votes )

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 :

Rusting is a chemical change where iron and oxygen react together to make a new substance of completely different properties called iron oxide.

The chemical reaction is given as:

4Fe + 3O2 2Fe2O3

Rest all are physical changes.

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The rusting of an iron object is called:

Lakhmir Singh & Manjit Kaur - Chemistry