Exams › NEET › Chemistry

Constant acidity and alkalinity of buffer solution is due to the unionised acid or base.

1. Unionised acid
2. Unionised base
3. Both unionised acid and base
4. None of these

Correct answer: Both unionised acid and base

Solution

Buffer solutions maintain constant pH due to the presence of both unionised acid and base, which resist changes in pH by neutralizing added acids or bases.

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