alleryA group II sulphide precipitate is insoluble in yellow ammonium sulphide. Which subgroup is present?
AGroup III iron group
BGroup IV zinc group
CGroup IIA copper group
DGroup IIB arsenic group
Answer & Solution
Correct answer: C. Group IIA copper group
Copper group sulphides do not dissolve in yellow ammonium sulphide, while arsenic group sulphides do.
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