Which of the following carboxylic acids is most reactive towards esterification with given alcohol?

The following is an addition product of the reaction between ___ and sodium bisulphite.

What is the common name of the compound which has a CHO group attached to the sp2 hybridised carbon of a benzene ring?

As a result of intermolecular hydrogen bonding, carboxylic acids exists as __

Identify the reagent for the conversion of but-2-ene to ethanal.

p-Xylene on reaction with acidified potassium dichromate at high temperature gives ____

If the pKa value of acetic acid is 4.76, predict the pKa value of HCl.

Which of the following is used to shift the esterification reaction of carboxylic acids towards the right?