1.

The vapour pressure of n-hexane at 350 K is 840 torr and that of cyclohexane is 600 torr. Mote fraction of hexane in the mixture that boils at 350 K and 1 atm pressure assuming ideal behaviour is

A. 0.67                 
B. 0.8
C. 0.50                 
D. 2.2
Answer» B. 0.8


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