Which two organic compounds share a functional group? alcohol and ether aldehyde and ketone amide and amine ester and ether

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.

Solubility would be your answer.

Answer trigonal pyramidal;