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Question

Chemistry Question on Acids, Bases And Salts

Arrange the following in increasing order of their pH values:
(A) p-Nitrophenol,
(B) m-Cresol,
(C) m-Nitrophenol,
(D) Phenol.

A

(A) < (B) < (C) < (D)

B

(A) < (C) < (D) < (B)

C

(B) < (A) < (D) < (C)

D

(C) < (B) < (D) < (A)

Answer

(C) < (B) < (D) < (A)

Explanation

Solution

The pH values are determined by the acidic strength of each compound. p-Nitrophenol, having an electron-withdrawing group, is the most acidic, followed by m-Cresol and m-Nitrophenol. Phenol, with no substituents, is the least acidic among these compounds.