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CGP EDU Academic Team
Published on: August 14, 2026
We have acidic buffer of 
and 
. One or more of the following operations will not change pH
(I) diluting the mixture ten times
(II) adding some HCl
(III) adding some NaOH
(IV) adding equal moles of 
and 
the buffer
Select the correct alternate.
Text Solution
Verified by ExpertsThe correct answer is:
C
(I) Dilution → ratio unchanged → pH same
(II) 
changes ratio → pH changes
(III) 
changes ratio → pH changes
(IV) Equal moles added → ratio unchanged → pH same
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