Question

Milk is pure substance yes or no give resons....

Answer 1

No, it is not a pure substance.

Reason

Becuase a pure substance is a homogeneous material which contains particles of only one kind and has a definite set of properties. So it is a mixture not pure substance.

Why it is a mixture?

Milk is a mixture becuase milk is separated by physical means, i.e. melting and boiling, 
Hope it helps you ☺️

Answer 2

hell... ooo
No, it is not a pure substance.

Reason:

Becuase a pure substance is a homogeneous material which contains particles of only one kind and has a definite set of properties. So it is a mixture.

hope this helps you.....!!