Question

The name of the compound CH₃ - CH₂ - CHO is _______.
(A) Propanal
(B) Propanone
(C) Ethanol
(D) Ethanal

Answer 1

3          2         1

CH₃ - CH₂ - CHO

There are three carbon atoms in the chain. So, the name of the basic carbon chain is ‘propane’. The functional group present in aldehyde (-CHO). So, the suffix used is ‘al’. The name of the carbon chain is modified by replacing the final ‘e’ with ‘al’. So, the name of the given compound is ‘propanal’.