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JEE Main levelSingle correct optionDifficulty 2 of 3rx056

In acidic medium permanganate oxidises oxalate to carbon dioxide. The mole ratio that react is

  1. A2 : 5
  2. B5 : 2
  3. C1 : 5
  4. D1 : 2

Answer: A

Each gains 5 electrons and each loses 2 electrons. Equalising electrons: 2 x 5 = 5 x 2 = 10, so the ratio is 2 : 5.
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