Question

Intramolecular hydrogen
bond:
А
Decreases Volatility
B
Increases melting point
C
increases viscosity
D
Increases vapour pressure​

Answer 1

A. Decreases volatility

Intramolecular H− bonding increases the volatility. In chemistry, volatile means the tendency of a substance to vaporize. Intramolecular H− bond increase vapour pressure.

For example, due to presence of intramolecular H− bonding between OH and NO2 groups ortho nitrophenol is more volatile.