Select all substances with an acceptor atom that can hydrogen bond to a hydrogen atom that is part of a polar covalent bond.

HCCH ethyne
Br2 dibromine
H2CCH2 ethene
CH3Cl chloromethane
CH3CH2CO2H propionic acid
OF2 oxygen difluoride

1 answer

You've only listed one substance. The H atoms on acetylene are acidic.