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JEE Main levelOne or more correct optionsDifficulty 2 of 3rx196

In acidic medium, 1 mol of $KMnO X_{4}$ is equivalent to which of the following (all reactions quantitative)?

A5 mol of $Fe X^{2 +}$ oxidised to $Fe X^{3 +}$
B2.5 mol of $H X_{2} C X_{2} O X_{4}$ oxidised to $CO X_{2}$
C2.5 mol of $H X_{2} O X_{2}$ oxidised to $O X_{2}$
D2.5 mol of $I X^{-}$ oxidised to $I X_{2}$

Answer: A, B, C

One mole of permanganate accepts 5 mol of electrons. Each

Fe X^{2 +}

gives 1 electron (5 mol), each

H X_{2} C X_{2} O X_{4}

gives 2 (2.5 mol), each

H X_{2} O X_{2}

gives 2 (2.5 mol), and each

I X^{-}

gives 1 electron, so 5 mol of

I X^{-}

, not 2.5, are needed. So A, B and C are correct.

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