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In the dichromate dianion,

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In the dichromate dianion,
A. 4Cr - O bonds are equivalent
B. 6Cr - O bonds are equivalent
C. all Cr-O bonds are equivalent
D. all Cr-O bonds are non-equivalent
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Correct Answer - B
In the dichromate dianion `Cr_2O_7^(2-)` , six Cr-O bonds are equivalent (bond length 161 pm each ).
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