The reaction that joins two monomers to form a polymer is known as a reaction. the molecule of water formed is due to the interaction between and a hydrogen ion

Answers:

             (i)  The reaction that joins two monomers to form a polymer is known as a dehydration reaction.

            (ii)  The molecule of water formed is due to the interaction between Hydroxide ion and a hydrogen ion.

Explanation:

              (i)  Dehydration means the removal / elimination of water molecules in a particular reactions. For example, when amino acids are reacted they form a polypeptide chain with the elimination of water molecules. Such reactions are also called as condensation reactions.

            n H₂N-RHC-COOH    →   H₂N-[RHC-CO-NH-RHC]n-COOH  +  n H₂O

              (ii)  Water molecule has a chemical formula of H₂O. In statement we are given with hydrogen ion (i.e. H⁺) So, we are in need of the counter part which is OH, also the OH should contain a negative charge i.e. OH⁻. Hence, OH⁻ (Hydroxide Ion) will react with H⁺ to form water i.e.

                                              OH⁻  +  H⁺    →    H₂O