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

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

NTA AbhyasNTA Abhyas 2022

Solution:

Solution
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.