Ethyne undergoes the following reactions except

Ethyne (also known as acetylene) can undergo polymerization, addition, and substitution reactions. However, it does not undergo esterification reactions. Polymerization involves the combination of many ethyne molecules to form a long-chain polymer. Addition reactions involve the addition of atoms or groups to the double bond of ethyne to form a saturated compound. Substitution reactions involve the replacement of one or more hydrogen atoms in ethyne with another atom or group. Esterification, on the other hand, involves the reaction between an alcohol and a carboxylic acid to form an ester. Ethyne does not have a functional group that can react with carboxylic acids or alcohols to form esters, so it cannot undergo esterification reactions.