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In which of the following substances will hydrogen bonds be strongest?
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The correct answer is:
\(\mathrm{H}_2 \mathrm{O}\)
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.
\(\mathrm{F} > \mathrm{O} > \mathrm{N} > \mathrm{Cl}\)
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.
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