Question: 3.92 g of ferrous ammonium sulphate crystals are dissolved in 100 ml of water, 20 ml of this solution requires 18 ml of KMnO₄ during titration for complete oxidation. The weight of KMnO4 present in one litre of the solution is [Tamilnadu CET 2002]
(a) 3.476 g
(b) 12.38 g
(c) 34.76 g
(d) 1.238 g
Correct Answer: (a) 3.476 g