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Q.

Consider the sulphides $H g S, P b S, C u S, N i S, A s_{2} S_{3} a n d C d S$ . Number of these sulphides soluble in $50 %$ $H N O_{3}$ is

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Detailed Solution

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$P b S, C u S,$ $A s_{2} S_{3},$ $C d S$ are soluble in $50 %$ $H N O_{3}$ . Where as $H g S$ and $N i S$ are insoluble in $50 %$ $H N O_{3}$

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