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:
- The formulae of the given ores are as follows:
Malachite
Copper pyrites
$: CuCO _3 \cdot Cu(OH) _2$
Dolomite
$: CuFeS _2$
- Azurite
-
$CaMg\left(CO _3\right) _2$
-
$Cu _3(CO) _3(OH) _2$
