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Extraction of Aluminium

The ore that ...

Question

The ore that contains both iron and copper is:

A

malachite

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B

dolomite

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C

azurite

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D

copper pyrites

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Solution

The correct option is C copper pyrites
The chemical composition of different ores are:-
Copper pyrites : $C u F e S_{2}$

Malachite : $C u (O H)_{2} . C u C O_{3}$

Azurite : $C u (O H)_{2} .2 C u C O_{3}$

Dolomite $C a C O_{3} . M g C O_{3}$
So, option D is correct.

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