Question

Weakest hydrogen bond is:

• A. $O-H..........N$
• B. $S-H.........S$
• C. $F-H..........F$
• D. $N-H..........N$

Answer 1

Answer: (B)

$S-H.........S$

A hydrogen bond is the electrostatic attraction between polar groups that occurs when a hydrogen $\left(H\right)$ atom bound to a highly electronegative atom such as nitrogen $\left(N\right)$, oxygen $\left(O\right)$ or fluorine $\left(F\right)$ experiences attraction to some other nearby highly electronegative atom. Weakest hydrogen bond will be formed when the electronegativity difference between the atom and $H$ is the least. Hence, $S-H-----H$ form the weakest hydrogen bond.