Extraction of Metals - Result Question 5
####5. The one that is not a carbonate ore is
(2019 Main, 9 April II)
(a) siderite
(b) calamine
(c) malachite
(d) bauxite
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Solution:
- Bauxite is not a carbonate ore. Its chemical formula is $Al _2 O _3$ or $AlO _x(OH) _{3-2 x}$, where $0<x<$ I Chemical formula of other ores given in options are as follows:
Siderite- $FeCO _3$
Calamine- $ZnCO _3$
Malachite- $CuCO _3 \cdot Cu(OH) _2$
