JEE Advanced 2021 Paper 2

A sample (5.6g) containing iron is completely dissolved in cold dilute HCl to prepare a 250mL of solution. Titration of 25.0mL of this solution requires 12.5mL of 0.03MKMnO4 solution to reach the end point. Number of moles of Fe2+ present in 250mL solution is x×10−2 (consider complete dissolution of FeCl2 ). The amount of iron present in the sample of y% by weight.
(Assume: KMnO4 reacts only with Fe2+ in the solution Use : Molar mass of iron as 56gmol−1 )