The decreasing order of reactivity of `m-`nitrobromobenzene (I0, 2, 4, 6-trinitrobromo-benzene (II), `p-`nitrobromobenzene (III), and 2,4-dinitrobromobenzene (IV), towards `OH^(-)` ions is:

Options

A. `I gt II gt III gt IV`
B. `II gt IV gt III gt I`
C. `IV gt II gt III gt I`
D. `II gt IV gt I gt III`

Answer

B

Explanation

Reactivity decreases with the decrease in the number of `NO_(2)` group. M-nitromobenzene is however, still less reactive than o, or p-nitro isomers. This is because the `NO_(2)` at meta position cannot stabilise the intermediate carbocation.