JEE Advance - Chemistry (2011 - Paper 2 Offline - No. 10)
Passing H2S gas into a mixture of Mn2+, Ni2+, Cu2+ and Hg2+ ions in an acidified aqueous solution precipitates
CuS and HgS
MnS and CuS
MnS and NiS
NiS and HgS
Explanation
Cu2+ and Hg2+ ions belong to Group II of inorganic salt analysis and their sulphides are very less soluble in aqueous medium.
Hence, CuS and HgS will be precipitated out even in acidic medium by passing H2S gas.
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