Metallurgy Principles and Processes
Chemistry ⇒ Metals and Non-metals
Metallurgy Principles and Processes starts at 9 and continues till grade 12.
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See sample questions for grade 11
A sample of bauxite contains 60% Al₂O₃. Calculate the mass of pure Al₂O₃ in 250 kg of the ore.
Describe the process of leaching with an example.
Explain the role of a flux in metallurgy.
Explain why carbon cannot be used to reduce aluminium oxide to aluminium.
Explain why highly electropositive metals are extracted by electrolytic reduction.
Name the chemical used as a depressant in the froth flotation process for separating lead sulphide (PbS) from zinc sulphide (ZnS).
Name the process used to purify copper by making use of electricity.
State one reason why froth flotation is not suitable for oxide ores.
State the principle behind magnetic separation as used in metallurgy.
Which process is used for the extraction of gold and silver from their ores by dissolving them in a suitable reagent?
Write the chemical equation for the reduction of zinc oxide by carbon.
