COMEDK Exam 2012 Solved Paper

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Question : 90 of 180

Marks: +1, -0

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

K‌sp ‌ of CuS<K sp of ZnS
K‌sp ‌ of CuS =K‌sp ‌ of ZnS
K‌sp ‌ of CuS >K‌sp ‌ of ZnS
CuS is more stable than ZnS

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