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  4. The total number of carboxylic acid groups in the product P is

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Q. The total number of carboxylic acid groups in the product $P$ isChemistry Question Image

JEE AdvancedJEE Advanced 2013Aldehydes Ketones and Carboxylic Acids

Solution:

PLAN Reactant is cyclic anhydride and changes to dicarboxylic acid on hydrolysis.
Also there is decarboxylation on heating if there is keto group w.r.t $- COOH$ group. Ozonolysis cleaves $( C = C )$ bond and $H _{2} O _{2}$ oxidises $-CHO$ to $- COOH$ group.
Thus, number of $- COOH$ groups in $P=2$.

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