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If P0 and Pdelta are the vapour pressure...

If `P_0` and `P_delta` are the vapour pressure of solvent and solution respectively and `N_1` and `N_2` are the mole of solute and solvent then:

A

`(P_0-P_delta)/P_0 = N_1/(N_1+N_2)`

B

`(P_0-P_delta)/P_delta = N_1/N_2`

C

`P_delta` = `P_0 . N_2/(N_1 + N_2)`

D

All

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The correct Answer is:
D
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