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Question: Answered & Verified by Expert
According to Raoult's law mole fraction of solute in solution is given by formula
ChemistrySolutionsMHT CETMHT CET 2021 (24 Sep Shift 2)
Options:
  • A $\frac{\Delta \mathrm{P}}{\mathrm{P}_1^0}$
  • B $\frac{\mathrm{P}_1^0}{\mathrm{P}_1}$
  • C $\frac{\mathrm{P}_1^0}{\Delta \mathrm{P}}$
  • D $\frac{\mathrm{P}_1}{\mathrm{P}_1^0}$
Solution:
2410 Upvotes Verified Answer
The correct answer is: $\frac{\Delta \mathrm{P}}{\mathrm{P}_1^0}$
$P_1=$ Vapour pressure of solution
$\mathrm{P}_1^0=$ Vapour pressure of pure solvent
Mole fraction of solute $=\frac{\mathrm{P}_1^0-\mathrm{P}_1}{\mathrm{P}_1^0}=\frac{\Delta \mathrm{P}}{\mathrm{P}_1^0}$

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