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  4. Find the total number of C-C bonds of equal length in the dianion of squaric acid, <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-0oeirlpecdzxs4z0.jpg />

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Q. Find the total number of $C-C$ bonds of equal length in the dianion of squaric acid,
Question

NTA AbhyasNTA Abhyas 2022

Solution:

The dianion is resonance stabilized, because the negative charges are equally distributed between each oxygen atom, the dianion of squaric acid is completely symmetrical. All $C-C$ bonds have the same bond length. The following are the resonating structures,
Solution