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MediumChemistryVapour Pressure & RLVP

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A solution X contains 30 mole % of A and is in equilibrium with its vapour that contains 40 mole % of B. The ratio of vapour pressures of pure A and B will be-

A

2 : 7

B

7 : 2

C

3 : 4

D

4 : 3

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