36. A solution has a 1 : 4 mole ration of pentane to hexane. The vapour pressure of the pure hydrocarbons at
20° C are 440 mmHg for pentane and 120 mmHg for hexane. The mole fraction of pentane in the vapour phase would be
a. 0.549
b. 0.200
c. 0.786
d. 0.478
Ans. d
(16)
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