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Question

On passing H2S into a solution containing both Zn2 and Cu2 in acidic medium, only CuS gets precipitated. This is because :

A
Ksp of CuS<Ksp of ZnS
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B
Ksp of CuS=Ksp of ZnS
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C
Ksp of CuS>Ksp of ZnS
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D
CuS is more stable then ZnS
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