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Borax

If equal volu...

Question

If equal volumes of 0.1 M $K M n O_{4}$ and $0.1 M K_{2} C r_{2} O_{7}$ solutions are allowed to oxidise $F e^{2 +}$ to $F e^{3 +}$ in acidic medium, then $F e^{2 +}$ oxidized will be:

A

More by $K M n O_{4}$

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B

More by $K_{2} C r_{2} O_{7}$

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C

Equal in both cases

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D

Cannot be determined

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Solution

The correct option is B
More by $K_{2} C r_{2} O_{7}$

More the $n_{f}$ , more will be the oxidation of other. $n_{f}$ of $K_{2} C r_{2} O_{7} > n_{f}$ of $K M n O_{4}$ .

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