Question

Which pairs of compounds will form the strongest hydrogen bonds with each other?

• A. $C_2{H}_{5}OH$ and $C{H}_{3}OC{H}_3$
• B. $HOC{H}_{2}C{H}_{2}OH$ and $H_{2}O$
• C. $HOC{H}_{2}C{H}_{2}OH$ and $C{H}_{3}OH$
• D. $C{H}_{3}OC{H}_3$ and $H_{2}O$

Answer 1

Answer: (C)

$HOC{H}_{2}C{H}_{2}OH$ and $C{H}_{3}OH$

$HOC{H}_{2}C{H}_{2}OH$ and $C{H}_{3}OH$ will form the strongest hydrogen bonds with each other.
A hydrogen bond is formed when a $H$ atom is attached to electronegative $N,O$ or $F$ atom.
In alcohols, oxygen is more electronegative than hydrogen atom as well as alkyl group produces polarity in $O-H$ bond.
Hence, the option (C) is the correct answer.