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The Ksp of CuS, Ag2 S and HgS are 10^-31, 10^-44 and 10^-54 respectively. The solubility of the three sulphides are in the order

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The Ksp of CuS, Ag2S and HgS are 10-31, 10-44 and 10-54 respectively. The solubility of the three sulphides are in the order

(a) Ag2S > CuS > HgS

(b)  Ag2S > HgS > CuS

(c)  HgS > Ag2S > CuS

(d)  CuS > Ag2S > HgS 

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1 Answer

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Best answer

Correct option  (a) Ag2S > CuS > HgS

Explanation:

The one with smallest Ksp value is least soluble. Let S be the solubility. Then,

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