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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:

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

I gt II lt III gt IV

Text Solution

Verified by Experts

The correct Answer is:
B
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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Knowledge Check

  • 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:

    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`

  • 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)

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

    A
    `(I) gt (II) gt (III) gt (IV)`
    B
    `(IV) gt (III) gt (II) gt (I)`
    C
    `(III) gt (IV) gt (II) gt (I)`
    D
    `(I) gt (II) gt (IV) gt (III)`
    • DISHA PUBLICATION-HALOALKANES AND HALOARENES -Exercise -2 : Concept Applicator
    1. The decreasing order of reactivity of meta-nitrobrombenzene (I) 2,4,6-...

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    2. Although hexafluoroethane (C2F6,b.p.-79^@C) and ethane (C2H6 b.p. – 89...

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    3. Consider the following anions. When attached to sp^3-hydridiz...

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    4. Which of the following si most reactive toward S(N^(2)) reaction ?

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    5. Which Is a true statement concering the transition state of an S(N^(2)...

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    6. In the following reaction, compound (B) is

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    7. Identify correct reactivity order for SN1 reaction

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    8. then A is

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    9. CH3CH2Cloverset(NaCN)rarrXoverset(Ni//H2)rarrY Yoverset(Acetic)und...

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    10. Isobutene overset(HBr)underset("peroxide")rarrAoverset(KCN)rarrBoverse...

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    11. X in the following reaction is Br2+overset(CH3-C-H)underset(H-C-CH...

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    12. PhCOCHBr(2)overset(OH^(-))toAoverset(OH^(-))toBoverset(H^(+))toC The...

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    13. Which of the following statements is correct?

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    14. CH3-CH2-undersetunderset(Cl)|CH CH3 obtained by chlorination of n buta...

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    15. Which of the following is fast de-brominated ?

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    16. Which chloroderivative of benzene among the following would undergo hy...

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    17. The compound C7H8overset(3Cl2/Delta)rarrAoverset(Br2/Fe)rarrBoverse...

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    18. Which compound in each of the following pairs is most reactive to the ...

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    19. Chlorobenzene reacts with trichloro acetaldehyde in the presence of H2...

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    20. In the following sequence of reaction CH(3)-Br overset(KCN)rarrA ove...

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