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Solution


Q.

Which of the following is the most soluble in water
1 Bi2S3 (Ksp=1×10-70)  
2 Ag2S (Ksp=6×10-51)  
3 CuS (Ksp=8×10-37)  
4 MnS (Ksp=7×10-16)  

Ans.

(4)

Solubility is directly proportional to Ksp. MnS has the highest Ksp among the given substances and hence has the highest solubility.