Which of the following class of compounds can exist as dipolar ions in solution?

Answer Details

A class of compounds that can exist as dipolar ions in solution are those that contain functional groups with both a positive and a negative charge. These are called zwitterions. Amino acids are an example of a compound that can exist as a dipolar ion in solution, as they contain both an amino group (NH2) with a positive charge and a carboxyl group (COOH) with a negative charge. Therefore, the answer is: Amino acids.