Which of the following chemical reaction is NOT the chief reaction during the extraction of Pb from PbS (High grade) ?

Question

TestHub · Accepted Answer

Extraction of lead from high-grade PbS involves roasting and self-reduction reactions.

Roasting:

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

is a chief reaction.

Self-reduction:

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

is also a chief reaction.

$C a O + S i O_{2} \to C a S i O_{3}$ forms slag, but $P b O + S i O_{2} \to P b S i O_{3}$ is not a chief reaction because lead oxide is reduced to lead metal.

Correct Answer: (D) $P b O + S i O_{2} \to P b S i O_{3}$

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