Q. KI in acetone, undergoes reaction with each of P, Q, R and S. The rates of the reaction vary as
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 1563  170 Haloalkanes and Haloarenes Report Error

Solution:

Relative reactivity for reaction in the given structures is
Column I Column II
Substrate image image
(S) (P) (R) (Q)
Relative Rates Towards 100000 200 79 0.02