The difference between the boiling point...

The difference between the boiling point and freezing point of an aqueous solution containing sucrose `(molecular wt.=342gmol^-1)` in 100g of water is `105^@C`. If `K_f` and `K_b` of water are 1.86 and `0.51K kg mol^-1` respectively, the weigth of sucrose in solution is about

A

34.2 g

B

342 g

C

7.2 g

D

72 g

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