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The separation of which of the following ions is not possible by H2S in acidic medium?(1) Pb2+, Bi3+(2) Cd2+, Co2+(3) Cu2+, Ni2+(4) Cu2+, Zn2+

Answer» The separation of which of the following ions is not possible by H2S in acidic medium?
(1) Pb2+, Bi3+
(2) Cd2+, Co2+
(3) Cu2+, Ni2+
(4) Cu2+, Zn2+


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