• # question_answer Which one of the following pair shows Buffers solution? A) $NaCl+NaOH$ B) $C{{H}_{3}}COONa+C{{H}_{3}}COOH$ C) $C{{H}_{3}}COOH+C{{H}_{3}}COON{{H}_{4}}$ D) ${{H}_{2}}S{{O}_{4}}+CuS{{O}_{4}}$

The Buffers solutions are those solutions which resists the change in its $pH$ value on addition of small amount of a base or an acid. $C{{H}_{3}}COOH$ and $C{{H}_{3}}COONa$ solution is Buffers solution because it is a solution of weak acid and its slat with strong base.