In which of the following substances will hydrogen bonds be strongest?
In which of the following substances will hydrogen bonds be strongest?
\(\mathrm{HCl}\)
\(\mathrm{H}_2 \mathrm{O}\)
\(\mathrm{HI}\)
\(\mathrm{H}_2 \mathrm{~S}\)
Solution
Ease of H-bonds formation, i.e., strength of hydrogen bonding given by electronegative elements follow the order.
\(\mathrm{F} > \mathrm{O} > \mathrm{N} > \mathrm{Cl}\)
So, \(\mathrm{HI}\) and \(\mathrm{H}_2\) S cannot make \(\mathrm{H}\)-bonds. In \(\mathrm{HCl}\), \(\mathrm{H}\)-bonding is very weak in nature. Here, only \(\mathrm{H}_2 \mathrm{O}\) will give strongest \(\mathrm{H}\)-bonding.