1.

Identify correct order of reactivity in electrophilic substitution reaction of the following compounds :

Answer»

` gt 2 gt 3gt 4`
`4 gt 3 gt 2 gt 1`
`2 gt 1gt 3 gt 4`
`2 gt 3 gt 1 gt 4`.

SOLUTION :`NO_(2)` and `CL` are electron withdrawing groups but `NO_(2)` is stronger electron withdrawing. Hence nitrobenzene is least reactive. `CH_(3)` GROUP is electron releasing and hence toluene is most reactive. Hence the correct order is :
toluene `gt` BENZENE `gt` chlorobenzene `gt` nitrobenzene.


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