Solutions Question 126

Question: Which one of the following is the expression of Raoult’s law

Options:

A) $ \frac{p-p_{s}}{p}=\frac{n}{n+N} $

B) $ \frac{p_{s}-p}{p}=\frac{N}{N+n} $

C) $ \frac{p-p_{s}}{p_{s}}=\frac{N}{N-n} $

D) $ \frac{p_{s}-p}{p_{s}}=\frac{N-n}{N} $

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Answer:

Correct Answer: A

Solution:

$ p= $ vapour pressure of pure solvent $ p_{s}= $ vapour pressure of the solution $ n= $ number of moles of the solute $ N= $ number of moles of the solvent



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