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Assertion :Molar heat of vaporisation of...

Assertion :Molar heat of vaporisation of water is greater than benzene.
Reason:Molar heat of vaporisation is the amount of heat required to vaporise one mole of liquid at constant temperature.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
We know that heat of vaporisation of water at `100^(@)C` is 40.6 kJ and that of benzene is 31 kJ at `80^(@)C`. The amount of heat required to vaporise one mole of liquid at constant temperature is known as heat of vapourisation therefore, both assertion and reason are true but reason is not the correct explanation of assertion.
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