Arrange the following compounds in their increasing reactivity for electrophilic substitution:
Toulene,nitrobenzene,benzene
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Solution
Nitrobenzene <Benzene < Toluene
Nitrobenzene due to its electron withdrawing nature de-activates the benzene ring making electrophilic substitution difficult.
Whereas, toulene activates the ring due to +I effect facilitating the substitution.