Which compound can form hydrogen bonds?
I. R-NH2
II. R-COOH
III. CH4
A) I only
B) II only
C) III only
D) I and II
Explanation
Carboxylic acids and amines can H-bond (excluding quaternary amines). Methane (CH4) cannot H-bond.
a) I only, incorrect.
b) II only, incorrect.
c) III only, incorrect.
d) I and II, correct.
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