In the above compounds, the correct order of reactivity in electrophilic substitution reactions will be
As we have learned,
The benzene ring in toluene is activated by the +I as well as the hyperconjugation effect of the CH3 group. Cl deactivates the ring as –I effect predominates over +M while NO2 group deactivates the ring by –I as well as –M effect.
Therefore, the option number (1) is correct.
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