Question

18.A chemical change does not occur when-- a)Iron rusts b)Water boils c)Turning of time water milky by Co2 d)Burning of gases​

Answer 1

Correct option: b) Water boils

Chemical change does not occur when Water boils because during boiling of water there is a change in state (water changes from Liquid to Gaseous state).

That's why it is a kind of Physical Change.

A change in matter which does not change the chemical properties of the matter is called Physical Change. The size or shape of matter may be changed, but no chemical reaction occurs.

For more about Physical Change:

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