#### The name of the compound $CH_3 - CH_2 - CHO$ is (a) Propanal (b) Propanone (c) Ethanol (d) Ethanal

Solution:

Functional group present in $CH_3 - CH_2 - CHO$ is aldehyde.

The compound has 3 carbons so -Prop is the prefix

Aldehyde has a suffix of -al

Prefix + an + Suffix = Propanal

Therefore, option (a) is correct.