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Electronic Configuration and Oxidation States

But with O2 ...

Question

But with $O_{2}$ in the presence of $V_{2} O_{5}$ , at $500^{o} C$ , it undergoes oxidation to give maleic anhydride. Naphthalex under same conditions gives phthalic anhydride.

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Solution

Maleic acid on oxidation with $O_{2}$ and in presence if $V_{2} O_{5}$ gives anlydride

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