Question

In the dichromate dianion:

• A. Four $Cr-O$ bonds are equivalent
• B. Six $Cr-O$ bonds are equivalent
• C. All $Cr-O$ bonds are equivalent
• D. Three $Cr-O$ bonds are equivalent

Answer 1

The correct option is B Six $Cr-O$ bonds are equivalent


Six terminal $C-O$ bonds are equivalent due to resonance.