Answer: aldehyde and ketone
Justification:
These are the functional groups of those organic compounds:
Compound general formula name of the functional group
Alcohol R - OH hydroxil
Ether R - O - R' ether
O
||
Aldehyde - C - H Carbonyl
O
||
Ketone R - C - R' Carbonyl
O H
|| |
Amide - C - N - R Amide
Amine R - NH2 Amine
So, the only pair of compounds that share a functional group is aldehyde and ketone.
