Statement 1: β-Keto carboxylic acids lose CO2 when heated at about 370 K.Statement 2: An enol is first formed by loss of CO2 but it readily tautomerises to the more stable ketone.

Decarboxylation of a β-keto acid involves an enol intermediate that is formed by an internal proton transfer from the carboxylic acid group to the carbonyl oxygen atom of the ketone. The enol is transformed spontaneously into the corresponding ketone