Q.

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

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a

Mole fraction

b

Parts per million

c

Mass percentage

d

Molality

answer is A.

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Detailed Solution

According to Henry's law partial pressure of gas in the solution is proportional to the mole fraction of gas in the solution. p=KHxwhere, KH=Henry's constant Hence, (a) mole fraction is the correct choice.
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