Question

Among the following which is pure substance?

(A)Milk (B)Sea water (C)Soil (D)24 carat Gold

Answer 1

The answer is 24carat gold .

Answer 2

Milk is a mixture of water, fats, etc. So it is not pure. Sea water is a mixture of water,salt,etc. So it is not pure. Soli is a mixture of fine peices of rocks, humus,etc. So it is not pure. But 24 carat of gold is entirely made of gold and hence pure.