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Q.

An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase ?

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a

addition of Na2SO4

b

Addition of 1.0 molal KI

c

addition of NaCl

d

addition of water

answer is A.

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Detailed Solution

On addition of strong electrolyte, vapour pressure decrease. On addition of water, vapour pressure increase due to increase in XSolvent .

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