Question: 100% NCERT covered from Particular Keyword.Explanations are 100% from NCERT | [Difficult level: Easy] From NCERT NEET Derived Question.
(a) IV > I > II > III > V
(b) V > II > III > I > IV
(c) V > II > IV > III > I
(d) V > II > IV > I > III
Answer:(d) V is most stable because its anion is stabilized to a
greater extent through H – bonding with H atom of OH
present on both ortho-positions ; followed by II in
which one OH group is present. Compound IV comes
next to II because here –OCH3 group is present in ortho
position which although is not capable of forming
H–bonding yet more acidic than p-HOC6H4COOH (III)
due to ortho effect. Compound III is less acidic than
benzoic acid because of electron-releasing group in
the para position. Thus
