Question

Which of the following H-bonds is expected to have the maximum strength?

• A. H-O......H
• B. H-N.......H
• C. H-S.......H
• D. All have same strength

Answer 1

The correct option is A

H-O......H

H-bond is a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
Oxygen is more electronegative than N, S. Hence H-O......H is expected to have maximum strength.