The compound,which evolves carbon dioxide on treatment with an aqueous solution of sodium bicarbonate at $25^{\circ} C$,is

What is the reaction between an alcohol and a carboxylic acid called?

Which of the following reacts with benzoic acid to form ethyl benzoate?

How many organic products will be formed when the following compound undergoes decarboxylation?
(Image: $A$ substituted cyclopentane ring with two $-COOH$ groups at the same carbon atom,and two $-CH_3$ groups at adjacent carbons.)

The correct order of acidity for the following compounds is:

The compound that undergoes decarboxylation most readily under mild conditions is: