(i) This reaction is a type of combination reaction in which reactants combine to form a single product.

(ii) This reaction is a type of displacement type of reaction in which a reactive reactant displaces the less reactive element from the compound.

In the above reaction reactant A displaces B from the compound BC to form a new compound AC.

(iii) This reaction is a decomposition reaction in which compound A gets dissociated or broken down to form simple products B and C.

(iv) Double Displacement Reaction is a type of chemical reaction in which anions and cations of the reacting compounds exchange their positions to form different compounds.

This reaction is a double displacement type of reaction.