Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The ionisation constant of an acid, K, is the measure of strength of an acid. The 
values of
acetic acid, hypochlorous acid and formic acid are 
and 
respectively. Which of the following orders of pH of 0.1 mol 
solutions of these acids is correct?
A
Acetic acid 
hypochlorous acid 
formic acid
hypochlorous acid formic acid
B
Hypochlorous acid 
acetic acid 
formic acid
acetic acid formic acid
C
Formic acid 
hypochlorous acid 
acetic acid
hypochlorous acid acetic acid
D
Formic acid > acetic acid > hypochlorous acid
Text Solution
Verified by ExpertsThe correct answer is:
B
As the acidity or 
value increases, pH decreases thus, the order of pH value of the acids is
Hypochlorous acid 
Acetic acid 
Formic acid
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