A) \[-N{{H}_{2}}\]
B) \[-Cl\]
C) \[-N{{O}_{2}}\]
D) \[-{{C}_{2}}{{H}_{5}}\]
Correct Answer: B
Solution :
Electron accepting groups which make the substitution difficult are known of deactivating groups. the group or substituent already present on the ring also decides the position of incoming group. ortho and para directing groups are as follow \[-C{{H}_{3}},{{C}_{2}}{{H}_{5}}(-R),-N{{H}_{2}},-OH\], halogens, \[(Cl,\,Br,\,I)\]
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