In the dichromate dianion,

Options

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

Answer

B

Explanation

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

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