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Nitric Acid

When PbS is...

Question

When $P b S$ is treated with warm dilute ${H N O}_{3}$ , the products most likely will be :

{P b}^{2 +}, S, N O_{2}

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{P b}^{2 +}, S, N O

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P b O, S, N O

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P b O_{2}, S O_{4}^{2 -}, N_{2}

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Solution

The correct option is A ${P b}^{2 +}, S, N O$
The reaction is as follows:
$P b S + H N O_{3} \to P b (N O_{3})_{2} + N O + S + H_{2} O$
Hence, the products are ${P b}^{2 +}, S$ and $N O$ .

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