A) \[C{{H}_{3}}COON{{H}_{4}}\]
B) \[NaOH\]
C) \[Pb{{(OH)}_{2}}\]
D) \[N{{H}_{4}}Cl+N{{H}_{4}}OH\]
Correct Answer: D
Solution :
A buffer solution is one which is resistant to change of pH upon the addition of a small amount of acid or alkali. It is formed either by mixing weak acid and its salts or weak base and its salt. Therefore, \[N{{H}_{4}}OH\](weak base) and \[N{{H}_{4}}Cl\] (salt of\[N{{H}_{4}}OH\]) is basic buffer solution.
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