Identify the correct order of solubility of

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Problem

Identify the correct order of solubility of

\text{Na}_2\text{S}

,

\text{CuS}

and

\text{ZnS}

: (1)

\text{CuS} > \text{ZnS} > \text{Na}_2\text{S}

(2)

\text{ZnS} > \text{Na}_2\text{S} > \text{CuS}

(3)

\text{Na}_2\text{S} > \text{CuS} > \text{ZnS}

(4)

\text{Na}_2\text{S} > \text{ZnS} > \text{CuS}

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