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JEE Advanced2018ChemistryAminesActual

Paragraph: An organic acid P   ( C 11 H 12 O 2 ) can easily be oxidized to a dibasic acid which reacts with ethyleneglycol to produce a polymer dacron. Upon ozonolysis, P gives an aliphatic ketone as one of the products. P undergoes the following reaction sequences to furnish R via Q. The compound P also undergoes another set of reactions to produce S. Question : The compound R is

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