Reversible reactions: Reaction in which entire amount of the reactants is not converted into products is termed as reversible reaction.
(i) Characteristics of reversible reactions
(a) These reactions can be started from either side,
(b) These reactions are never complete,
(c) These reactions have a tendency to attain a state of equilibrium, in which Free energy change is zero (ΔG = 0),
(d) This sign (⇌) represents the reversibility of the reaction,
(ii) Examples of reversible reactions
(a) Neutralisation between an acid and a base either of which or both are weak e.g.,