See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Na2CO3 does not react with KMnO4/H+ Meq of KMnO4/H+ = 400  0.5  5 = 1000 Meq of Na2C2O4 = 1000 or W E  1000 = 1000 W E = 1 n-factor of Na2C2O4 is 2 as it is converted to CO2 Moles of Na2C2O4 = Equivalent W / E 1 n factor 2 2      Mole fraction = 1/ 2