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Q.
The correct order of $S_{N}2 / E_{2}$ ratio for the $\%$ yield of product of the following halide is :
Haloalkanes and Haloarenes
Solution:
Rate of $S _{N} 2$ reaction $: 1^{\circ}>2^{\circ}>3^{\circ},$ as $\beta$ -branching increases steric crowding increases in transition state so it makes less stable T.S.
