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Arrange the following set of compounds in the order of their decreasing relative reactivity with an electrophile. Give reason.

 

 

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The methoxy group(-OCH_{3})makes anisole more reactive than benzene because it is an electron releasing group and increases the electron density of the benzene ring due to the +R effect.

 

 

Cl group is less reactive than methoxybenzene as it gives +R and -I effect. And, Chlorobenzene is more reactive than -NO_{2} group since the -NO_{2}  gives -I and -R effect.

 

 

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