[sumitsaurav]

20 ml of M-kmno4 soln is diluted to 150 ml.in that soln 50 ml of 10  M- H2so4 is added 25 ml of this mxture is titrate with 20 ml Fec204 soln.the molarity of Fec204 soln is?
 1] 0.0416
2] 0.208
3] 0.625
4] 0.125

[Hunter2]

Its really hard to read. Use for kmno4 KMnO₄ and asked again. And show your attempt where you have difficulties to calculate or understand.

[Radu]

  You need to take into account that Fe²⁺ is oxydized to Fe³⁺ and C₂O₄^2- is oxydized to CO₂. Mn⁷⁺ is reduced to Mn²⁺. If you still don't get your answer, take into consideration the reduction of manganese to Mn₃O₄, a very stable manganese compund often precipitated after acidic REDOX processes.

[Borek]

take into consideration the reduction of manganese to Mn₃O₄, a very stable manganese compund often precipitated after acidic REDOX processes.

MnO₂ is what precipitates typically when the pH is not low enough.