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X MnO4− + Y C2O4^2− + Z H+ ⇌ X Mn^2+ + 2Y CO2 + Z/2 H2O In the following balanced reaction, values of X, Y and Z respectively are

1. 2,5,16
2. 8,2,5
3. 5,2,16
4. 5,8,4

Correct answer: 2,5,16

Solution

The coefficients X, Y, and Z represent the stoichiometric ratios needed to balance the redox reaction between permanganate ions and oxalate ions in acidic solution, where 2 permanganate ions react with 5 oxalate ions and 16 protons to produce 2 manganese ions, 10 carbon dioxide molecules, and 8 water molecules, ensuring mass and charge conservation.

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