Analytical ChemistryHard
Question
Yellow ammonium sulphide solution is a suitable reagent for the separation of :
Options
A.HgS and PbS
B.PbS and Bi2 S3
C.Bi2 S3 and CuS
D.CdS and As2 S3
Solution
Yellow precipitate of CdS is insoluble in yellow ammonium sulphide where as yellow precipitate of As2S3 is soluble forming (NH4)3 AsS4.
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