A) \[N{{H}_{4}}Cl+N{{H}_{4}}OH\]
B) \[NaCl+NaOH\]
C) \[N{{a}_{2}}HP{{O}_{4}}+N{{a}_{3}}P{{O}_{4}}\]
D) \[C{{H}_{3}}COOH+C{{H}_{3}}COONa\]
Correct Answer: B
Solution :
Buffer solution is a combination of weak acid and conjugate base. NaCl is a salt and NaOH is the base.
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