Extraction of Metals - Result Question 17

####17. The ore that contains both iron and copper is

(a) malachite

(b) azurite

(c) dolomite

(d) copper pyrites

(2019 Main, 9 Jan I)

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Solution:

  1. The formulae of the given ores are as follows:

Malachite

Copper pyrites

$: CuCO _3 \cdot Cu(OH) _2$

Dolomite

$: CuFeS _2$

Azurite

$CaMg\left(CO _3\right) _2$

$Cu _3(CO) _3(OH) _2$



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