The decreasing order of reactivity of me...

The decreasing order of reactivity of meta-nitrobrombenzene (I) 2,4,6-trinitrobromo-benzene (II), para-nitrobromobenzene (III), and 2,4-dinitrobromobenzene (IV) towards `HO^(-)` ions is:

I gt II gt III gt IV

II gt IV gt III gt I

IV gt II gt III gt I

I gt II lt III gt IV

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The correct Answer is:

Reactivity decreases as the number of `-NO_2` group w.r.t. -Br decreases.m- Nitrobrumobenzene is, however, less reactive than the p-nitrobromobenzene since the `-NO_2` group at the m-position cannot stabilize the intermediate carbanian by resonance.

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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:

`I gt II gt III gt IV`

`II gt IV gt III gt I`

`IV gt II gt III gt I`

`II gt IV gt I gt III`

Arrange the following in the increasing order of ease of nucleophilic substitution reaction Chlorobenzene (I) 2,4,6 trinitrochlorobenzene (II) 2,4 dinitro- chlorobenzene (III) and 4- nitrochlorobenzene (IV)

`I lt IV lt III lt II`

`I lt III lt IV lt II`

`II lt III lt IV lt I`

`IV lt III lt II lt I`

The decresing order of reactivity towards SE (substitution by electrophile) of the following is : (I) Nitrobenzene (II) Chlorobenzene (III) Toluene (IV) Benzene.

`(I) gt (II) gt (III) gt (IV)`

`(IV) gt (III) gt (II) gt (I)`

`(III) gt (IV) gt (II) gt (I)`

`(I) gt (II) gt (IV) gt (III)`