question_answer

In the below mentioned compounds the decreasing order of reactivity towards electrophilic substitution is (i)??..                                  (ii)                             (iii)                                          (iv)                                   JEE Main Online Paper (Held On 12 May 2012)

A)  (iv)>(i)>(ii)>(iii)               

B)                        (ii)>(iii)>(i)>(iv)

C)                        (iii)>(i)>(iv)>(ii)

D)                        (i)>(ii)>(iii)>(iv)

Correct Answer: D

Solution :

 \[-OC{{H}_{3}}\] and \[-C{{H}_{3}}\] groups are activating group while \[-C{{F}_{3}}\] is a deactivating group.