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An aqueous solution is 1.00 molal in KI....

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

A

addition of NaCl

B

addition of`Na_(2)SO_(4 )`

C

addition of 1.00 molal KI

D

addition of water

Text Solution

Verified by Experts

The correct Answer is:
D
According to raoults law
`P_(s)=PX_(A)(X_(A)=` mole fraction of solvent ) and on addition of water the mole fraction of water in the solution increase therefore vapour pressure increases.
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