A) \[HgS\] and \[PbS\]
B) \[PbS\] and \[B{{i}_{2}}{{S}_{3}}\]
C) \[B{{i}_{2}}{{S}_{3}}\] and \[CuS\]
D) \[CdS\] and \[A{{s}_{2}}{{S}_{3}}\]
Correct Answer: D
Solution :
\[C{{d}^{+2}}\] belongs to IIA group while \[A{{s}^{+3}}\] to II B. All the sulphides of II B are soluble in yellow ammonium sulphide but those of II A are insoluble.
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