Compound is a pure substance whereas mixture is not. Explain.

Asked by Topperlearning User | 7th May, 2014, 12:31: PM

Expert Answer:

A compound consists of atoms of two or more different elements bound together which can be broken down into simpler matter (element) by chemical means only and the ratio of its component atoms is always same. They have a fixed melting point, boiling point etc. On the other hand, a mixture consists of two or more different elements mixed in any variable ratio. Mixture is not termed as pure as its components are not present in a fixed ratio, they can be separated by simple physical methods. They do not have fixed melting point, boiling point etc.

Example: Baking soda (sodium bicarbonate, NaHCO3) is a pure compound. Baking powder, on the other hand, is a mixture of sodium bicarbonate and other substances, such as corn starch.

Answered by  | 7th May, 2014, 02:31: PM