How many Cr-O bonds are equivalent in the dichromate anion?

Question

How many Cr-O bonds are equivalent in the dichromate anion? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/c-5brhkzbddbx8h5pm.jpg" /> In the above structure, there are 8 Cr-O bonds, terminal Cr-O bonds which are in total 6,are equivalent due to resonance and the two bridged Cr-O bonds are different from the terminal Cr-O bonds due to the absence of resonance.

Q. How many Cr−O bonds are equivalent in the dichromate anion?

In the above structure, there are 8 Cr-O bonds, terminal Cr-O bonds which are in total 6,are equivalent due to resonance and the two bridged Cr-O bonds are different from the terminal Cr-O bonds due to the absence of resonance.

Q. How many $C r - O$ bonds are equivalent in the dichromate anion?