Which of the following ore is not in oxide form?
- Malachite
- Haematite
- Magnetite
- Zincite
The Correct Option is A
Solution and Explanation
Malachite is a copper carbonate hydroxide mineral ore. It is sticking green and has a banded pattern, making it attractive. The chemical formula for malachite is Cu2CO3(OH)2. It is the ore for secondary copper minerals. Malachite has a perfect cleavage, that is it can be split into thin sheets. Due to the pattern and beautiful color, it is widely used as ornamental items. Apart from this, all the given ores are oxides. Hematite is an iron oxide with a chemical formula of Fe2O3. Magnetite is an iron oxide ore with the chemical formula as Fe3O4. It is the most common and important iron ore. Zincate generally contain zinc oxide (ZnO).
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Concepts Used:
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What are Ores and Minerals?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –
- Concentration of the ore
- Isolation of the metal from its concentrated ore
- Purification of the metal
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