An atom or group of atoms which makes an organic compound reactive and decides its functions is called functional group.
Table of formulae of different functional groups
| Sno. | Formula of Functional Group | Name |
| 1. |  |
Alcohols |
| 2. |  |
Aldehydes |
| 3. |  |
Ketones |
| 4. |  |
Carboxylic acids |
| 5. |  |
Esters |
Where, R represents alkyl group.
Test your understanding and answer these questions:
- What are functional groups? Give examples.