Why does have a lower boiling point than have a lower boiling point than ?

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forms hydrogen bonds.

forms ionic bonds.

forms hydrogen bonds.

forms ionic bonds.

answer is A.

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Detailed Solution

Concept- Hydrogen bonding occurs between the H atom bonded to the highly electronegative atom (F, O or N) and the electronegative atom of another molecule.
Now, the physical properties (melting point, boiling point, physical state) of substances depend upon the intermolecular forces acting between their molecules.
As per the definition of hydrogen bonding,

is capable to form hydrogen bonds with other molecules of

.
Thus, in

there is no hydrogen bonding present whereas in

There is intermolecular hydrogen bonding present, due to which a lot of energy is required to break these bonds. So, the boiling point of

increases.
Hence, the correct option is (1).

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