Question

which best explains the formation of polyester?
a condensation polymerization of a carboxylic acid and an alcohol
an addition polymerization of a carboxylic acid and an alcohol
a condensation polymerization of two alcohols
an addition polymerization of two alcohols

Explanation:

Polyesters are formed through condensation polymerization. The monomers involved are a carboxylic - acid and an alcohol. In this process, a small molecule (such as water) is eliminated as the ester bonds are formed to create the polymer. Addition polymerization does not apply here, and it is not the reaction between two alcohols.

Answer:

a condensation polymerization of a carboxylic acid and an alcohol