The correct order of reactivity of the following benzyl halides towards reaction with textKCN is:
Benzyl halide structures for Q59 - JEE Main 2026 Evening
Four substituted benzyl halide structures labelled a, b, c, d.

Solution & Explanation

### Core Logic The reaction proceeds via an S_N1 mechanism for activated benzyl halides or nucleophilic substitution rate depends on carbocation stability / electronic effects of substituents (-OH, -textNH_2, -textNO_2, etc.). - Amino and hydroxy substituents strongly activate through +M effect. - Nitro groups strongly deactivate through -M effect. ### Step 1: Final Conclusion The correct order of reactivity is b > a > d > c, corresponding to option (2). ### Pattern Recognition Sees: benzyl halide reactivity with cyanide. Trap: Confusing polar/inductive effects with resonance effects of substituents. ### Chapter Mix Class 12 Chemistry: Haloalkanes and Haloarenes
Carbocation stability comparison for Q59 - JEE Main 2026 Evening
Four substituted benzyl halide structures labelled a, b, c, d.

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Haloalkanes And Haloarenes

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