Write chemical equations for metallurgical processes to represent roasting of Galena $(P b S)$ .

2 P b S + 3 O_{2} \to P b_{2} O_{2} + 2 S O_{2}

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P b S + 2 O_{2} \to P b O + S O_{3}

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2 P b S + 3 O_{2} \to 2 P b O + 2 S O_{2}

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None of these

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Solution

The correct option is D $2 P b S + 3 O_{2} \to 2 P b O + 2 S O_{2}$
Roasting of galena $(P b S)$ can be given by the following chemical reactions :

$2 P b S + 3 O_{2} \to 2 P b O + 2 S O_{2}$

Here, the sulphide ore is converted to oxide.

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