In the dichromate dianion (Cr_2O_7^{2-}),whic | vedclass

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(B) The structure of the dichromate dianion $(Cr_2O_7^{2-})$ consists of two $CrO_4$ tetrahedra sharing a common oxygen atom.In this structure,there a

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$6$ $Cr-O$ bonds are equivalent

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(B) The structure of the dichromate dianion $(Cr_2O_7^{2-})$ consists of two $CrO_4$ tetrahedra sharing a common oxygen atom.In this structure,there are $6$ terminal $Cr-O$ bonds (three on each chromium atom) and $2$ bridging $Cr-O-Cr$ bonds.The $6$ terminal $Cr-O$ bonds are equivalent due to resonance,while the $2$ bridging bonds are different from the terminal ones.Therefore,$6$ $Cr-O$ bonds are equivalent.

In the dichromate dianion $(Cr_2O_7^{2-})$,which of the following statements is correct regarding the $Cr-O$ bonds?

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