AIPMT 2012 Physics and Chemistry Paper

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Question : 71 of 100

Marks: +1, -0

Buffer solutions have constant acidity and alkalinity because :

these give unionized acid or base on reaction with added acid or alkali.
acids and alkalies in these solution are shielded from attack by other ions.
they have large excess of H+or OH−ions
they have fixed value of pH.

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