Question

what do you understand by a pure substance ? Is milk a pure substance​

Answer 1

Explanation:

Milk is not a pure substance, it's a mixture. Pure substances are either elements or compounds. Milk is predominately a mixture of water, lactose,...

Answer 2

Pure substances are those that do not contain impurities of any kind. Elements and compounds are usually included in pure substances.

Milk is not a pure substance. It is a mixture of various substances.