A) \[Sn{{O}_{2}}\]
B) \[Si{{O}_{2}}\]
C) \[C{{O}_{2}}\]
D) \[Ca{{O}_{2}}\]
Correct Answer: A
Solution :
A species is amphoteric, if it is soluble in acid (behaves as a base) as well as in base (behaves as an acid). \[\underset{\text{Basic}}{\mathop{Sn{{O}_{2}}}}\,+\underset{\text{Acid}}{\mathop{4HCl}}\,\xrightarrow{{}}SnC{{l}_{4}}+2{{H}_{2}}O\] \[\underset{\text{Acid}}{\mathop{Sn{{O}_{2}}}}\,+\underset{\text{Base}}{\mathop{2NaOH}}\,\xrightarrow{{}}N{{a}_{2}}Sn{{O}_{3}}+{{H}_{2}}O\]
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