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Potassium Dichromate

In acidic med...

Question

In acidic medium $H_{2} O_{2}$ changes $K_{2} C r_{2} O_{7}$ to $C r O_{5}$ (deep violet solution in ether) having two peroxy linkage. Oxidation number of Cr in $C r O_{5}$ is;

A

10

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B

-10

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C

4

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D

6

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Solution

The correct option is D 6
By looking at the structure we can see, that oxidation number of $C r$ in $C r O_{5}$ is +6.

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