Extraction of Metals from Ores
Chemistry ⇒ Metals and Non-metals
Extraction of Metals from Ores starts at 9 and continues till grade 12.
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Describe the process of froth flotation.
Describe the role of limestone in the extraction of iron from its ore in the blast furnace.
Explain the term 'smelting'.
Explain why aluminium cannot be extracted from its ore by reduction with carbon.
Explain why gold and platinum are found in a free state in nature.
Explain why metals like sodium and potassium are extracted by electrolysis and not by chemical reduction.
Name one metal that is extracted by reduction with aluminium.
Name the main ore of copper.
Name the process by which mercury is extracted from cinnabar.
Name the process used to concentrate sulphide ores.
Name the process used to extract highly reactive metals like sodium and aluminium from their ores.
Name the process used to extract iron from haematite.
What is the main impurity present in iron ore?
Why is carbon not used to reduce aluminium oxide?
A student is given a sample of an ore containing both magnetic and non-magnetic impurities. Which method should be used to concentrate the ore, and why?
Arrange the following metals in order of increasing difficulty of extraction from their ores: iron, aluminium, silver. Explain your reasoning.
During the extraction of a metal, why is it important to remove gangue from the ore before reduction?
Explain why the extraction of zinc from zinc oxide is carried out using carbon, but the extraction of magnesium from magnesium oxide requires electrolysis.
