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Question

A, B, C and D are volatile liquids. The order of volatility is A > C > B > D. Now, at a particular temperature:


A
Vapour pressure of A > Vapour Pressure of D
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B
Vapour pressure of C > Vapour pressure of B
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C
Vapour pressure of B < Vapour pressure of D
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D
Vapour pressure of A > Vapour pressure of B
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Solution

The correct options are
A Vapour pressure of A > Vapour Pressure of D
B Vapour pressure of C > Vapour pressure of B
D Vapour pressure of A > Vapour pressure of B

Volatility is the tendency of a substance to vapourize. Volatility is directly related to a liquid's vapour pressure. More volatile liquids have a higher vapour pressure. At a given temperature, a substance with higher vapour pressure vaporizes more readily than a substance with a lower vapour pressure. Now, volatility order is: A > C > B > D. So, order of vapour pressure will be: A > C > B > D.


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