In which of the following pair(s), the minerals are converted in to metals by self-reduction process?

C u_{2} S, P b S

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P b S, H g S

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P b S, Z n S

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A g_{2} S, C u_{2} S

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Solution

The correct options are
A $C u_{2} S, P b S$
B $P b S, H g S$
In the self reduction process, metal sulfide reacts with metal oxide to form free metal.
The conversion of metal ore to crude metal by self reduction process is carried for the pairs $C u_{2} S, P b S$ and $P b S, H g S$ .
For example cupric oxide reacts with cupric sulphide to form crude copper metal.
$2 P b S + 3 O_{2} \to 2 P b O + 2 S O_{2}$
$P b S + 2 P b O \to 3 P b + S O_{2}$ (self reduction)
$C u_{2} S + 2 C u_{2} O \to 6 C u + S O_{2}$
$H g S + 2 H g O \to 3 H g + S O_{2}$

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Similar questions

C u_{2} S

H g S

A g_{2} S

Z n S

How many of the following metals are extracted by self reduction process?
$P b, A u, M g, S n, F e, A l, A g, H g, N a, Z n, C u, C a$

F e_{2} O_{3}, S n O_{2}, P b S, M g C l_{2}, H g S, Z n S, A l_{2} O_{3}, A g_{2} S, C u_{2} S

(\frac{Q + R}{P \times S})

P b S

P b

A

P b S a i r - \to Δ P b O + S O_{2} C \to P b + C O_{2}

B

P b S a i r - \to Δ P b O + P b S \to P b + S O_{2}

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