question_answer

Which of the following is precipitation as well as double displacement reaction?

A)  \[NaOH(aq)+HN{{O}_{3}}(aq)\xrightarrow{{}}\]\[NaN{{O}_{3}}(aq)+{{H}_{2}}O(l)\]

B)  \[Cu(s)+2AgN{{O}_{3}}(aq)\xrightarrow{{}}\]\[Cu{{(N{{O}_{3}})}_{2}}(aq)+2Ag(s)\]

C)  \[2Hg(s)+{{O}_{2}}(g)\xrightarrow{heat}2HgO(s)\]

D)  \[FeC{{I}_{3}}(aq)+3N{{H}_{4}}OH(aq)\xrightarrow{{}}\]\[Fe{{(OH)}_{3}}(s)+3N{{H}_{4}}CI(aq)\]