3.92 g of ferrous ammonium suphate ar dissolved in 100 Ml water 20 ml of this solution requires 18 complete oxidation the weight of KMnO_(4) present in one litre of the solution is

3.92 g of ferrous ammonium suphate ar dissolved in 100 Ml water 20 ml

1.	3.92 g of ferrous ammonium suphate ar dissolved in 100 Ml water 20 ml of this solution requires 18 complete oxidation the weight of KMnO_(4) present in one litre of the solution is
Answer» 34.76 G 12.38 g 1.23 g 3.476 g Solution :The redox reaction involving the oxidation of `Fe^(2+)` is `MnO_(4)^(-)+5Fe^(2+)+8H^(+)rarr5Fe^(3+)+MN^(2+)+4H_(2)O` Mol WT of ferrous ammonium suphate `(NH_(4))SO_(4)FeSO_(4)6H_(23)O=392` applyinhg molarity equation `=(M_(2)V_(2))/(n_(2))` or `(0.1xx20)/(5)=(M_(2)xx18)/(1)` or `M_(2)=(0.1xx20)/(5xx18)=(M)/(45)` Amount of `KMnO_(4)` present in one litre =Molarity x mol wt `1/45xx158=3.51` g since 3.476 g isclose to 3.51 g therefore option (d) is correct