The strongest oxidizing agent among the following is:

K_{2} C r_{2} O_{7}

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M n O_{2}

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K M n O_{4}

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C l_{2}

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Solution

The correct option is C $K M n O_{4}$
$E_{C r_{2} O_{7}^{2 -} | C r^{3 +}}^{⊖} = 1.33 V; E_{M n O_{2} | M n^{2 +}}^{⊖} = 1.23 V$

$E_{M n O_{4}^{⊖} | M n^{2 +}}^{⊖} = 1.51 V; E_{C l_{2} | C l^{⊖}}^{⊖} = 1.36 V$

$∵ E_{M n O_{4}^{⊖} | M n^{2 +}}^{⊖}$ is highest, so $K M n O_{4}$ is the strongest oxidizing agent.

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