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The correct order of acid strength of the following compounds: (A) Phenol (B) p-Cresol (C) m-Nitrophenol (D) p-Nitrophenol is :

The correct order of acid strength of the following compounds: (A) Phenol (B) p-Cresol (C) m-Nitrophenol (D) p-Nitrophenol is :

Grade:11

2 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
Dear student

The answer is d>c>a>b

Regards
Vikas TU
14149 Points
one year ago
p-Nitrophenol>phenol>p-cresol
Nitro group in para nitrophenol applies -m effect that is lone pair attracting effect and brings complete positive charge on its ortho and para position . On the para position of nitro group carbon atom is hydroxy group carbon atom. The positive charge on this carbon is unstable and hence it attracts the lone pair of oxygen thus weakening the oxygen and hydrogen bond and increasing the acidic strength.

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