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Extracting Metals in the Middle of Reactivity Series

Partial roast...

Question

Partial roasting of chalcopyrite produces:

C u_{2} S

and

F e O

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C u_{2} O

and

F e O

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C u S

and

F e_{2} O_{3}

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C u_{2} O

and

F e_{2} O_{3}

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Solution

The correct option is A $C u_{2} S$ and $F e O$
Partial roasting:
$2 C u F e S_{2} + O_{2} Δ - \to C u_{2} S + 2 F e S + S O_{2}$
$2 F e S + 3 O_{2} \to 2 F e O + 2 S O_{2}$

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3 : 2

F e O

F e_{2} O_{3}

2 : 3

F e O

F e_{2} O_{3}

O_{2}

C u_{2} O

C u_{2} S

F e_{2} O_{3}

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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