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The vapor pressure of o-nitrophenol at a...

The vapor pressure of o-nitrophenol at any given temperature is predicted to be

A

higher than that of p-nitrophenol

B

lower than that of p-nitrophenol

C

same as that of p-nitrophenol

D

higher or lower depending upon the size of the vessel

Text Solution

Verified by Experts

The correct Answer is:
A
o-Nitrophenol exists as a monomer on account of intramolecular H-bonding while p-nitrophenol exists as associated substance on account of intermolecular H-bonding. Thus, o-nitrophenol is more volatile (higher vapor pressure) than p-nitrophenol.
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