Which compound forms hydrogen bonds in the liquid state?

A.     \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\)

B.     \({\text{CHC}}{{\text{l}}_{\text{3}}}\)

C.     \({\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}\)

D.     \({{\text{(C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{\text{)}}_{\text{3}}}{\text{N}}\)

A

One respondent stated that there are two correct answers to this question, namely A. and C. This is incorrect as C. is \({\text{C}}{{\text{H}}_{\text{3}}}{\text{CHO}}\) which is an aldehyde, and this does not form hydrogen bonding between its molecules. Hence the only correct answer is A. \({{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}{\text{OH}}\).