Which of the following compounds is not solub | vedclass

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(A) In qualitative analysis,the solubility of metal sulfides in dilute $HNO_3$ depends on the solubility product $(K_{sp})$ of the sulfide and the oxi

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$HgS$

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(A) In qualitative analysis,the solubility of metal sulfides in dilute $HNO_3$ depends on the solubility product $(K_{sp})$ of the sulfide and the oxidizing power of the acid. $HgS$ (mercuric sulfide) has an extremely low $K_{sp}$ value $(10^{-52})$,which makes it insoluble in hot dilute $HNO_3$. Other sulfides like $PbS$,$CuS$,and $CdS$ have higher $K_{sp}$ values and are soluble in hot dilute $HNO_3$ because the acid oxidizes the $S^{2-}$ ion to elemental sulfur,shifting the equilibrium forward.

Which of the following compounds is not soluble in hot dilute $HNO_3$?

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