Q.

The solubility of a specific non-volatile salt is 4 g in 100 g of water at 25oC. If 2.0 g, 4.0 g and 6.0 g of the salt added of 100 g of water at 25oC, in system X, y and Z. The vapour pressure would be in the order:

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a

X

b

X>Y>Z

c

Z>X=Y

d

X>Y=Z

answer is D.

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Detailed Solution

Solution X is unsaturated so v. pr. will be more, solution Y and Z are saturated so v. pr. of Y =v. pr. of Z and 2 gm of solute would be present in form of solid in system Z.
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