Question

CH3,NH2,OH and F in increasing pkb values are :

Answer 1

Hello Taanurang
Short answer:F>OH>NH2>CH3
Explanation:
Kb of a species determines its basic character and pKb on the other hand is inversely proportional to the basic character of a substance, because pKb=-logKb.So the less basic the species more the pKb.In the above question CH3 is most basic as it is least electronegative which is followed by NH2 OH and F
So order of
BASIC CHARACTER OR Kb=F<OH<NH2<CH3
and hence order of pKb=F>OH>NH2>CH3

Cheers!