Question

The correct order of minusI effect is

Answer 1

Relative inductive effects (+ or - I effects) have been experimentally measured with reference to Hydrogen, in decreasing -I effect or increasing +I effect, as follows: NH3+ > NO2 > SO2R > SO3H > CHO > CO > COOH > COCl > CONH2 > F > Cl > Br > I > OH > OR > NH2 > C6H5 > CH=CH2 > H.