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Solubility of alkali metal is maximum among the following. Among ZnS (1.7 × 10⁻¹⁵) & CuS (8 × 10⁻³⁷) ZnS has higher value of Ksp.

1. ZnS
2. CuS
3. Both ZnS and CuS
4. None of these

Correct answer: ZnS

Solution

The solubility of a compound is directly related to its solubility product (Ksp). Since ZnS has a higher Ksp value (1.7 × 10⁻¹⁵) compared to CuS (8 × 10⁻³⁷), ZnS is more soluble.

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