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9.14 Among NH3, H2O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?

Answers (1)

R Rakesh

Answer-

The strength of hydrogen bonding depends on the electronegativity of an atom

electronegativity order $N<O<F$

The expected order should be $NH_{3}<H_{2}O<HF$

But the actual order is $NH_{3}<HF<H_{2}O$

This is because of the extent of H bonding in a water molecule is more due to the presence of one extra hydrogen atom. Also, Oxygen atom forms a huge ring like structure through its high ability of hydrogen bonding

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