Q. The correct increasing order of trans-effect of the following species is :
A) $NH_3 > CN^- > Br^- > C_6H_5^-$
B) $CN^- > C_6H_5^- > Br^- > NH_3$
C) $Br^- > CN^- > NH_3 > C_6H_5^-$
D) $CN^- > Br^- > C_6H_5^- > NH_3$
Explanation
[Solution] The trans-effect series is $CN^- > C_6H_5^- > Br^- > NH_3$ (written in decreasing order despite the question's wording). Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.