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Statement Addition of a non-volatile ...

Statement Addition of a non-volatile solute causes a depression in vapour pressure.
Explanation vapour pressure of a solution is directly proportional to mole fraction of solvent.

A

`S` is correct but `E` is wrong.

B

`S` is wrong but `E` is correct.

C

Both `S` and `E` are correct and `E` is correct explanation of `S`.

D

Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Text Solution

Verified by Experts

The correct Answer is:
C
`P_(S) prop (N)/(n+N)`
or `P_(S) = P^(circ)(N)/(n+N)`
or `(P_(S))/(P^(circ)) = (N)/(n+N)`
or `1-(P_(S))/(P^(circ))=1-(N)/(n+N)`
or `(P^(circ)-P_(S))/(P^(circ)) = (n)/(n+N)`
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