In the dichromate dianion,

Options

A. 4Cr-O bonds are equivalent
B. 6 Cr-O bonds are equivalent
C. All Cr-O bonds are equivalent
D. All Cr-O bonds are nonequivalent

Answer

B

Explanation

The structure of `Cr_(2)O_(7)^(2-)`

These are six normal Cr-O bonds and two bridged Cr-O bonds. The six normal Cr-O bonds are expected to be equaivalent and different from those of the bridged Cr-O bonds.