Question

In which of the following substances will hydrogen bond be strongest?

• A. $HCl$
• B. $H_{2}O$
• C. $HI$
• D. $H_{2}S$

Answer 1

Answer: (B)

$H_{2}O$

Small size and higher electronegative atom forms the strongest hydrogen bond

$O$ is smaller in size and higher in the electronegativity than other options.

So the correct answer is $B$.