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WB JEE 2016
MCQ (Single Correct Answer)
+1
-0.25
If p$$^\circ$$ and p are the vapour pressure of the pure solvent and solution and n1 and n2 are the moles of solute and solvent respectively in the solution then the correct relation between p and p$$^\circ$$ is
A
$$p^\circ = p\left[ {{{{n_1}} \over {{n_1} + {n_2}}}} \right]$$
B
$$p^\circ = p\left[ {{{{n_2}} \over {{n_1} + {n_2}}}} \right]$$
C
$$p = p^\circ \left[ {{{{n_2}} \over {{n_1} + {n_2}}}} \right]$$
D
$$p = p^\circ \left[ {{{{n_1}} \over {{n_1} + {n_2}}}} \right]$$
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