Question

The boiling point of water is exceptionally high because:

A

There is covalent bond between H and O

B

Water molecules are linear

C

Water molecules associate due to hydrogen bonding

D

Water molecules are not linear.

Medium

Solution

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Correct option is C)

It is due to hydrogen bonding.
In H2O oxygen is highly electronegative and due to this the electron of hydrogen deviates towards oxygen making it a polar molecule that is creating delta positive charge on hydrogen and delta negative charge on oxygen.
Because of this the hydrogen atom forms hydrogen bonding with oxygen of other water molecules having delta negative charge.
The hydrogen bonding makes the overall bond of the molecule strong. So while boiling water first the hydrogen bond has to be broken and then the hydrogen and oxygen bond will be broken. And hence the boiling point is exceptionally high.

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