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Number of identical Cr-O bonds in dichro...

Number of identical Cr-O bonds in dichromate ion `Cr_(2)O_(7)^(2-)` is :

A

`4Cr-O` bonds are equivalent

B

`6Cr-O` bonds are equivalent

C

All `Cr-O` bonds are equivalent

D

None of `Cr-O` bonds are equivalent

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The correct Answer is:
B
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