1.

Which of the following mixture in aqueous solution of equimolar concentration acts as a buffer solution?

A. HNO<sub>3</sub> + NaOH
B. H<sub>2</sub> SO<sub>4</sub> + KOH
C. NH<sub>4</sub> OH(excess) + HCl
D. CH<sub>3</sub> COOH + NaOH(excess)
Answer» D. CH<sub>3</sub> COOH + NaOH(excess)


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