Arrange in order of decreasing trend towards electrophilic substitution reactions: Chlorobenzene (I), Benzene (II), toluene (III) anilinium chloride (IV)
A
III> II > I > IV
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B
IV > I > II > III
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C
II > I > IV > III
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D
I > II > IV > III
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Solution
The correct option is A III> II > I > IV Reactivity towards electrophilic substitution reaction depends upon stability of arenium ion intermediate. Stability of arenium ion increases in the presence of EDG group (causing +R, +I, H) and decreases in the presence of EWG (causing -R, -I). So, the correct order will be III> II > I > IV