Arrange the given set of compounds in order of their decreasing relative reactivity with an electrophile, $E^{+}$ .

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Solution

The decreasing order of relative reactivity with an electrophile is:
Chlorobenzene $> p -$ nitrochlorobenzene $> 2, 4$ dinitrochlorobenzene

As the number of electron withdrawing nitro groups on the benzene nucleus increases, the electron density of benzene ring decreases and the reactivity with an electrophile decreases.

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Arrange the given set of compounds in order of their decreasing relative reactivity with an electrophile, E+.

Arrange the given set of compounds in order of their decreasing relative reactivity with an electrophile, $E^{+}$ .