question_answer

For the following reactions where, \[{{k}_{s}}\] and \[{{k}_{e}}\], are, respectively, the rate constants for substitution and elimination, and \[\mu =\frac{{{k}_{s}}}{{{k}_{e}}}\]the correct option is _________ .  [JEE MAIN Held on 07-01-2020 Evening]

A) \[{{\mu }_{B}}>{{\mu }_{A}}\] and \[{{k}_{e}}(A)>{{k}_{e}}(B)\]

B) \[{{\mu }_{A}}>{{\mu }_{B}}\] and \[{{k}_{e}}(A)>{{k}_{e}}(B)\]

C) \[{{\mu }_{B}}>{{\mu }_{A}}\] and \[{{k}_{e}}(A)>{{k}_{e}}(B)\]

D) \[{{\mu }_{A}}>{{\mu }_{B}}\] and \[{{k}_{e}}(A)>{{k}_{e}}(B)\]

Correct Answer: D

Solution :

[d]             when \[{{Z}^{\Theta }}=C{{H}_{3}}C{{H}_{2}}{{O}^{-}}(A)\]             \[\Rightarrow \,\,{{\mu }_{A}}>{{\mu }_{B}}\] and \[{{k}_{e}}(B)\,>\,{{k}_{e}}(A)\]