question_answer 1)

  Assertion (A): An aqueous solution of ammonium acetate can act as a buffer. Reason (R): Acetic acid is a weak acid and  \[N{{H}_{4}}OH\] is a weak base.

Answer:

  (b) \[C{{H}_{3}}COOH\]and\[N{{H}_{2}}OH\]are weak acid and weak base. \[{{K}_{b}}(C{{H}_{3}}COOH)={{K}_{b}}(N{{H}_{4}}OH)\] Thus, \[C{{H}_{3}}COON{{H}_{4}}\] will behave as buffer.