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MCQMediumJEE Main 2026 · 22 January, Shift 1SN1 & SN2 Reactions

Chemistry Question from JEE Main 2026 · 22 January, Shift 1

The correct order of the rate of reaction of the following reactants with nucleophile by SN1\mathrm{S_N1} mechanism is:

Four brominated substrates labeled I, II, III and IV are shown for comparing their SN1 reactivity, with I and II being rigid bicyclic structures, III a tertiary alkyl bromide, and IV a triphenylmethyl bromide.

(Given: Structures II and IIII are rigid)

  • A

    III<I<II<IVIII < I < II < IV

  • B

    I<II<III<IVI < II < III < IV

  • C

    II<I<III<IVII < I < III < IV

  • D

    IV<III<II<IIV < III < II < I

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