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JEE Main Chemistry Haloalkanes and Haloarenes 2026 JEE Main 2026 (22 January Shift 1)

JEE Main Chemistry Question (2026) — Solution

Question

The correct order of the rate of reaction of the following reactants with nucleophile by SN1 mechanism is: (Given : Structure I and II are rigid)

Options

  1. A. III < I < II < IV
  2. B. IV < III < II < I
  3. C. I < II < III < IV
  4. D. II < I < III < IV

Answer

D. II < I < III < IV

Step-by-step solution

Rate of S_N1 Stability of C^ formed (I) and (II) are unstable due to Bredt's rule, (I) has more +I effect. (II) < (I) < (III) < (IV)

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