A) \[HN{{O}_{3}}\]
B) \[HCO_{3}^{-}\]
C) \[{{H}_{2}}O\]
D) \[N{{H}_{3}}\]
Correct Answer: A
Solution :
\[HN{{O}_{3}}\] (nitric acid) is generally not an amphoteric substance. It is a strong acid (proton-donating) though sometimes, \[in\]presence of stronger acid, it also act as base (e.g. in nitration of aromatic compounds. It act as a base and accept proton form \[{{H}_{2}}S{{O}_{4}}\]). However \[HCO_{3}^{-},{{H}_{2}}O\], and \[N{{H}_{3}}\]frequently act both as ail acid as well ,as a Base (i.e. amphoteric in nature)
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