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Dry air was passed successively through ...

Dry air was passed successively through a solution of 5 g of a solute in 180 g of water and then through pure water. The loss in the weight of solution was 2.50 g and that of pure solvent 0.04 g. The molecular weight of the solute is.

A

31.25

B

3.125

C

312.5

D

None of these

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