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Question

Which of the following is a chemical change?

A

Boiling of water to give water vapor.

B

Melting of ice to give water

C

Dissolution of salt is water

D

Rusting of iron

Medium

Solution

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Correct option is
D

Rusting of iron

Rusting is the process by which iron changes to hydrated iron oxide or rust when iron comes in contact with oxygen and water. Since, a new chemical substance is formed in this process, it is a chemical change.

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