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Roasting

Choose the co...

Question

Choose the combination that contains metals whose ores are most appropriate for roasting.

Ag, Cu, Pb

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Ag, Cu, Sn

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Ag, Mg, Pb

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Al, Cu, Pb

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Solution

The correct option is A
Ag, Cu, Pb

Let us look at the chief ores of the given metals:

Cu (Copper): ${CuFeS}_{2}$ (Chalcopyrites)

Ag (Silver): ${Ag}_{2} S$ (Argentite)

Pb(Lead): $PbS$ (Galena)

All these ores are sulphide ores and sulphide ores undergo roasting which is heating of the ore in excess supply of air to convert the ore into their respective oxides.

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Similar questions

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

P b + C u (N O_{3})_{2} \to P b (N O_{3})_{2} + C u

C u + A g (N O_{3})_{2} \to C u (N O_{3})_{2} + A g

Z n + P b (N O_{3})_{2} \to Z n (N O_{3})_{2} + P b

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I

Z n (s) + C u {({N O}_{3})}_{2} (a q) \to C u (s) + Z n {({N O}_{3})}_{2} (a q)

I I

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