5 g of `Na_(2)SO_(4)` was dissolved in x g of `H_(2)O` . The change in freezing point was found to be `3.82^(@)C` . If `Na_(2)SO_(4)` is `81.5%` ionised , the value of x (`k_(f)` for water =`1.86^(@)C` kg `"mol"^(-1)`) is apporximately : (molar mass of S=32 g `"mol"^(-1)` and that of Na=23 g `"mol"^(-1)`)A. 25 gB. 65 gC. 15 gD. 45 g

5 g of `Na_(2)SO_(4)` was dissolved in x g of `H_(2)O` . The change in

1.	5 g of `Na_(2)SO_(4)` was dissolved in x g of `H_(2)O` . The change in freezing point was found to be `3.82^(@)C` . If `Na_(2)SO_(4)` is `81.5%` ionised , the value of x (`k_(f)` for water =`1.86^(@)C` kg `"mol"^(-1)`) is apporximately : (molar mass of S=32 g `"mol"^(-1)` and that of Na=23 g `"mol"^(-1)`)A. 25 gB. 65 gC. 15 gD. 45 g
Answer» Correct Answer - D

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