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Grade: 12th pass 
        
Identify the correct of solubility of Na base 2S, CuS and ZnS in aqueous medium
a. CuS > ZnS > Na base 2S
b. ZnS > Na base 2S > CuS
c. Na base 2S > CuS > ZnS
d. Na base 2S > ZnS > CuS
4 years ago

Answers : (1)

Kevin Nash
askIITians Faculty
332 Points 
							


(d) Sodium salts are highly soluble. Cu^2+
belongs to the II^nd group in salt analysis and is precipitated as CuS, whereas
Zn^2+ belongs to the IV group and is precipitated as ZnS after CuS because of
higher K base sp of ZnS.
4 years ago
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