Which of the following statements about the composition of vapour over an ideal 
molar mixture of benzene and toluene is correct? [Assume temperature is constant at 
and vapour pressure benzene and toluene at 
are 
and 
respectively]
A
The vapour will contain a higher 
of benzene.
of benzene.
B
The vapour will contain a higher 
of toluene.
of toluene.
C
The vapour will contain equal amount of benzene and toluene.
D
Not enough information is given to make predictions.
Text Solution
Verified by ExpertsThe correct answer is:
A
Let 
denotes benzene and 
denotes toluene
In 
molar mixture of 
and 
,
Mole fraction of 
and 
are
Vapour pressure of 
Vapour pressure of 
Thus, vapour will contain high percentage of benzene than toluene.
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