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Which of the following units is useful i...

Which of the following units is useful in relating concentration of solution with its vapour pressure ?

A

Mole fraction

B

Parts per million

C

Mass percentage

D

Molality

Text Solution

Verified by Experts

The correct Answer is:
A
Explanation : It is mole fraction (x) which is useful in relating concentration of solution with its vapour presure. For example according to Rault.s law in a binary solution of two volatile liquids, `p_(1)=x_(1)p_(1)^(0)` where `p_(1)` is vapour pressure of component I, and `x_(1)` is its mole fraction in solution, `p_(1)^(0)` denotes the vapour pressure of pure solvent.
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