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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

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

Grade:11

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
6 years ago

(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.

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