Mixed & Numerical Applications

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1.
Copper pyrites has the formula:
2.
Which metal is extracted by the Mond process?
3.
How much aluminium (in grams) is needed to reduce 1 mole of Cr2O3 by aluminothermy?
4.
Which of the following is the correct sequence for copper extraction from CuFeS2?
5.
The process of heating sulphide ore to convert it to oxide before reduction is called:

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