A) \[S{{O}_{4}}\]
B) \[C{{O}_{3}}\]
C) \[N{{H}^{+}}_{4}\]
D) \[C{{O}_{2}}\]
Correct Answer: C
Solution :
Nessler's reagent \[{{K}_{2}}Hg{{I}_{4}}\]is used to detect the presence of\[N{{H}_{4}}^{+}\].When the given salt is warmed with small amount of NaOH; a gas is given out which gives a brown precipitate. Hence, the correct option is [c].
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