A) \[HN{{O}_{3}}\]and\[N{{H}_{4}}N{{O}_{3}}\]
B) HCl and KCl
C) \[HN{{O}_{2}}\]and\[NaN{{O}_{2}}\]
D) NaOH and NaCl
Correct Answer: C
Solution :
The mixture containing a weak acid \[(HN{{O}_{2}})\] and its conjugate base\[(NO_{2}^{-})\]acts as acidic buffer.
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