InterviewSolution
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InterviewSolution
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Identify the correct order of solubility of `Na_(2)S,CuS and ZnS` in aqueous mediumA. CuSgtZnSgt`Na_(2)S`B. `ZnS gt Na_(2)S gt CuS`C. `Na_(2)S gt CuS gt ZnS`D. `Na_(2)S gt ZnS gt CuS` |
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Answer» Correct Answer - 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_(SP)` of `ZnS`. |
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