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If $P_0$ and $P_s$ are the vapour pressures of the solvent and its solution respectively and $N_1$ and $N_2$ are the mole fractions of the solvent and solute respectively, then

1 Answer

$(P^0-P_s)/P_s=N_1/(N_1+N_2)$
Hence (D) is the correct answer.
answered Jun 18, 2014 by sreemathi.v
 

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