Q.
The correct decreasing order of reactivity of A, B, C, D towards electrophilic substitution reactions is
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a
D > C > B > A
b
C > D > A > B
c
D > C > A > B
d
C > D > B > A
answer is D.
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Detailed Solution
When attached to benzenes ring-OH group . . . -I , +M . . . strong EDG-OCH3 group . . . -I, +M . . . . moderate EDG-CHO group . . . -I, -M . . . strong EWG-NO2 group . . . -I, -M . . . very strong EWGThe intermediate in ESR is arenium ionEWG destabilize arenium ionEDG stabilize arenium ion∴Reactivity of C > D > B > A .
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