What is the main composition of matte?

C u S

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C u O

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C u_{2} S

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C u_{2} O

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Solution

The correct option is D $C u_{2} S$
Copper matte is a combination of copper sulphide and a small amount of iron sulphide. In the process of copper extraction matte is the stage subsequent to the final reduction process which involves converting it to crude copper.
The composition of copper in copper matte is:
Copper sulphide $C u_{2} S$ , $80 - 95$ %

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Name the process used for the formation of blister $C u$ by following reaction :(unbalanced reactions)

$2 C u_{2} S + 3 O_{2} \to C u_{2} O + S O_{2}$

C u_{2} O + C u_{2} S \to C u + S O_{2}

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