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 is

Options

A. `-1`
B. 1
C. zero
D. 2

Answer

B