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Question

Number of identical Cr-O bonds in dichromate ion Cr2O2−7 is :

A
4
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B
6
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C
7
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D
8
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Solution

The correct option is B 6
The correct answer is - There are '6' identical Cr - O bonds in the dichromate ion (Cr2O27).

In a dichromate ion (Cr2O27)., there are 6 terminal Cr – O bonds. All these bonds are equivalent due to resonance.

The Dichromate ions (Cr2O27). are oxoanions of chromium in the oxidation state +6.
Hence option B is correct answer.

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