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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

MnO ions are reduced in acidic condition to Mn ions whereas they are reduced in neutral condition to MnO. The oxidation of 25 mL of a solution containing Fe ions required, in acidic condition, 20 mL of a solution containing MnO ions. What volume of solution would be required to oxidise 25 mL of solution containing Fe ions in neutral condition?

Answer: (C)

Solution

In acidic medium MnO has ; in neutral medium it has (MnMn). Using for solution against solution : acidic gives

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Question ID VK-130552