# Which substance exhibits the most hydrogen bonding?

## Homework Statement

Which of the following substances exhibits significant hydrogen bonding in the liquid state?

A) $CH_{2}F_{2}$
B) $N_{2}H_{4}$
C) $CH_{3}OCH_{3}$
D) $C_{2}H_{4}$
E) $C_{2}H_{2}$

## The Attempt at a Solution

I know that hydrogen bonding generally only works with hydrogen being attracted to a nonbonding pair on a very electronegative atom (N,F,O and Cl). So only A,B, and C can be the answer. The answer turns out to be B, but I really thought it would be A since flourine is the most electronegative.

I also don't understand whether being in the liquid state has any bearing on the problem.

BiP

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