Question

Which of the following is an aldehyde?

Answer 1

Answer:
`CH_3CH_2CH_2CHO` has aldehyde functional group.

Step-by-step explanation:

Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

A.
`CH_3CH_2CH_2COCH_3` has ketone
`C=O` functional group .

B.
`CH_3CH_2CH_2COOH` has carboxylic acid
`COOH` functional group .

C.
`CH_3CH_2CH_2CHO` has aldehyde
`H-C=O` functional group .

D.
`CH_3CH_2CH_2COOCH_3` has ester
`RO-C=O` functional group .

Thus
`CH_3CH_2CH_2CHO` has aldehyde (CHO) group.