question_answer

Which two sets of reactants best represents the amphoteric character of\[Zn{{\left( OH \right)}_{2}}\]? Set I   \[Zn{{\left( OH \right)}_{2}}\left( s \right)\] and \[\overset{-}{\mathop{O}}\,H\](a q) Set 11 \[Zn{{\left( OH \right)}_{2}}\left( s \right)\] and \[{{H}_{2}}O\left( I \right)\] Set III \[Zn{{\left( OH \right)}_{2}}\left( s \right)\] and \[{{H}^{+}}\left( aq \right)\] Set IV \[Zn{{\left( OH \right)}_{2}}\left( s \right)\]and \[N{{H}_{3}}\](a q)

A) III and II               

B) I and III

C) IV and I                

D) II and IV