Question

Provide :
1) order of ± I effect of some important groups .
2) order of ± R effect of some important groups .
:D

Answer 1

see this attachment....!!!

+I ----> CH2^- >NH^- > O^- > COO^- >3°alkyl >2°alkyl>1°alkyl>T>D>H

-I ----> OH2^+>NR3^+>SR2^+>NH3^+>NO2>CN>CHO>COOH>F>Cl>Br>I>OH>NH2>Phenol

Answer 2

I+ effect - electron rich Groups which can Donate the electrons
l- effect - electron deficient Groups which withdraw electrons
R + is ortho para directing in E.S.R.
R- is meta directing
Hope it helps