A) \[AuC{{l}_{3}}\]
B) \[A{{u}_{2}}S\]
C) \[Au(NH{{ }_{2}})=NH\]
D) \[H[Au{{(Cl)}_{4}}]\]
Correct Answer: C
Solution :
\[\mathbf{AuC}{{\mathbf{l}}_{\mathbf{3}}}\]it is a reddish solid soluble in water. \[\mathbf{A}{{\mathbf{u}}_{\mathbf{2}}}\mathbf{S}\]it is a dark brown solid insoluble in water. \[\mathbf{AuN}{{\mathbf{H}}_{\mathbf{2}}}\mathbf{=NH}\]or\[Au{{N}_{2}}{{H}_{3}}\]is fulminating gold. \[\mathbf{H[Au(Cl}{{\mathbf{)}}_{\mathbf{2}}}\mathbf{]}\]It is used in toning process in photography. \[HCl+AuC{{l}_{3}}\xrightarrow[{}]{{}}H[Au{{(Cl)}_{4}}]\]
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