Question

Distilled water is the purest form of water but it can not be used for drinking? Why

Answer 1

This is because distilled water do not have essentials minerals like iron, etc. that are needed by our body.So , drinking distilled water may lead to lack of some nutrients in one's body.

Answer 2

distilled water is purest form of water and it can be used for drinking. You are wrong when you say it can't be used for drinking. It can be used for drinking.
But you shouldn't use it as drinking water because we need many minerals which come along with water. In distilled water, the minerals are not there. So we need to drink mineral water, not distilled water.