A) \[KHg{{I}_{4}}\]
B) \[{{K}_{2}}Hg{{I}_{4}}+N{{H}_{4}}OH\]
C) \[{{K}_{2}}Hg{{I}_{4}}+KOH\]
D) \[KHg{{I}_{4}}+N{{H}_{4}}OH\]
Correct Answer: C
Solution :
The mixture of \[({{K}_{2}}Hg{{I}_{4}}+KOH)\] or \[({{K}_{2}}Hg{{I}_{4}}+NaOH)\] is known as Nesslel?s reagent. It gives a reddish brown precipitate or coloration with \[N{{H}_{3}}\]. \[2{{K}_{2}}[Hg{{I}_{4}}]+3KOH+N{{H}_{3}}\xrightarrow{{}}\]\[\underset{(reddish\,brown\,ppt)}{\mathop{HgO.Hg(N{{H}_{2}})I}}\,+4KI+3NaI+2{{H}_{2}}O\]
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