Question

what are functional groups write two eg​

Answer 1

The functional group is defined as an atom or group of atoms joined in a specific manner, which gives the chemical properties of the organic compound and are the centers for chemical reactivity.

Example: Alkanes and Ketones are two different functional groups.

Answer 2

Ciao,
An atom or a group of atoms or a double bond or a triple bond whose presence imparts specific properties to organic compounds ( compounds having carbon and hydrogen ) is called functional group.
Example c=c has functional group of double bond and is an alkene.
-oH has hydroxyl group and called alcohol.
- NH2 has amino group and called as amines.
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