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A non-volatile solute, 'A' tetramerises ...

A non-volatile solute, 'A' tetramerises in water to the extent of `80%`. 2.5 g of 'A' in 100 g of water, lowers the freezing point by `0.3^@C`. The molar mass of A in g `mol^(-1)`is `(K_f for water = 1.86 K kg mol^(-1) )`

A

62

B

155

C

221

D

354

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A
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