Verified Solution • 2025–26 Session moderate

QJEEM20Ch913d: JEE Main 2020 Chemistry - Class 12 JEEM20Ch913d Solution: For the following reactions K s and K e , are respectively, the …

For the following reactions

JEE Main 2020 (Online) 7th January Evening Slot Chemistry - Haloalkanes and Haloarenes Question 114 English
Ks and Ke, are respectively, the rate constants for substitution and elimination and μ=kske\mu = {{{k_s}} \over {{k_e}}} the correct options is

Multiple Choice Options

  • A μB>μA{\mu _B} > {\mu _A} and Ke(A) > Ke(B)
  • B μA>μB{\mu _A} > {\mu _B} and Ke(B) > Ke(A)
  • C μB>μA{\mu _B} > {\mu _A} and Ke(B) > Ke(A)
  • D μA>μB{\mu _A} > {\mu _B} and Ke(A) > Ke(B)

Step-by-Step Verified Solution

For 1o alkayl halide rate of substitute reaction is more than rate of elimination reaction.

When Z = A, then ks > ke and

when Z = B, then ks < ke

∴\therefore μ\mu A > μ\mu B

As B is strong base than A so for B more elimination reaction happens.

∴\therefore Ke(B) > Ke(A)

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