The pair(s) of ions where BOTH the ions are precipitated upon passing H2S gas in presence of dilute HCl is/are:
A
Ba2+,Zn2+
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B
Bi3+,Fe3+
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C
Cu2+,Pb2+
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D
Hg2+,Bi2+
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Solution
The correct options are CCu2+,Pb2+ DHg2+,Bi2+ Precipitate is formed on passing H2S in acidic medium i.e., the ion must belong to group II. Cu2+,Pb2+,Hg2+,Bi3+