The order of reaction is an experimentally determined quanity. It may be zero, poistive, negative, or fractional. The kinetic equation of `nth` order reaction is`k xx t = (1)/((n-1))[(1)/((a-x)^(n-1)) - (1)/(a^(n-1))]` …(i) Half life of `nth` order reaction depends on the initial concentration according to the following relation: `t_(1//2) prop (1)/(a^(n-1))` ...(ii) The unit of the rate constant varies with the order but general relation for the unit of `nth` order reaction is Units of `k = [(1)/(Conc)]^(n-1) xx "Time"^(-1)` ...(iii) The differential rate law for `nth` order reaction may be given as: `(dx)/(dt) = k[A]^(n)` ...(iv) where `A` denotes the reactant. For a reaction: `I^(ɵ) + OCl^(ɵ) rarr IO^(ɵ) + Cl^(ɵ)` in an aqueous medium, the rate of the reaction is given by `(d[IO^(ɵ)])/(dt) = k([I^(ɵ)][OCl^(ɵ)])/([overset(ɵ)(OH)])` The overall order of the reaction isA. `-1`B. 1C. zeroD. 2