The correct order of reactivity of the following compounds, towards electrophilic substitution reactions is

The correct order of reactivity of the following compounds, towards electrophilic substitution reactions is
  1. A > B > C > D
  2. D > C > B > A
  3. C > B > A > D
  4. B > C > A > D

Solution

Benzene become less reactive in electrophilic substitution reaction when deactivating group is present in it.
$ \begin{aligned} & (I=\text { inductive effect } \\ & H=\text { hyperconjugation effect } \\ & M=\text { mesomeric effect }) \end{aligned} $ Electrophilic substitution reaction is $\propto+M,+I,+H$ effect and $ \propto \frac{1}{-M,-I,-H} $
Hence, correct order is

Asked in: AP EAMCET 2019 (20 Apr Shift 2)

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