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Question

The vapour pressure of a solution of a non-volatile electrolyte (A) in a solvent (B) is 95% of the vapour pressure of the solvent at the same temperature. If MB=0.3MA, where MA and MB are molecular weights of (A) and (B) respectively, then the weight ratio of the solvent and solute are

A
69.8
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B
66.6
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C
5.7
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D
76.6
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