A) NiS and PbS
B) NiS and CoS
C) CoS and NiS
D) PbS and NiS
Correct Answer: D
Solution :
For precipitation, ionic product > solubility product \[\therefore \]The metal sulphide with lowest \[{{K}_{sp}}(PbS)\]will precipitate out first because its ionic product will exceed its \[{{K}_{sp}}\]first and the metal sulphide with lowest\[{{K}_{sp}}(NiS)\] will precipitate out at last.You need to login to perform this action.
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