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Standard XII
Chemistry
Electrophile
Reactivity or...
Question
Reactivity order towards electrophilic substitution reaction:
A
S > P > R > Q
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B
P > R > S > Q
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C
S > P > Q > R
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D
P > S > R > Q
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Solution
The correct option is
A
S > P > R > Q
Ring activating / electron donating groups increases reactivity towards electrophilic substitution reactions.
O
electron donating tendency
O
H
>
N
H
−
∥
C
−
C
H
3
>
C
H
3
>
C
O
O
H
d
e
a
c
t
i
v
a
t
i
n
g
g
r
o
u
p
Therefore correct order is
S
>
P
>
R
>
Q
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