. The vapour pressure of solvent decreased by 10 mm of mercury
when a non-volatile solute was added to the solvent. The mole fraction of solute in the solution is 0.2. What should be mole fraction of solvent if the decrease in the vapour pressure is to be 20 mm of mercury
A. 0.8
B. 0.6
C. 0.4
D. 0.2
Best Answer
Ans: B
Sol: 
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