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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Calculate the number of moles of aluminium produced when 54 grams of Al2O3 is completely reduced. (Atomic mass: Al = 27, O = 16)
Describe the principle of froth flotation process.
Describe the process of leaching with an example.
Explain the difference between calcination and roasting.
Explain why carbon cannot be used to reduce aluminium oxide to aluminium.
Explain why sulphide ores are usually converted to oxides before reduction.
In the context of metallurgy, what is meant by 'refining'?
Name the process used to extract aluminium from bauxite.
State the role of cryolite in the extraction of aluminium.
What is the main purpose of adding a flux during the extraction of metals?
A metallurgist is extracting a metal from its ore. The ore is first converted to its oxide, then reduced with carbon, and finally purified. Identify the metal if its oxide cannot be reduced by carbon and explain the reason.
A sample of zinc blende (ZnS) weighing 97 grams is roasted in air. Calculate the mass of zinc oxide (ZnO) formed. (Atomic masses: Zn = 65, S = 32, O = 16)
During the extraction of iron in a blast furnace, which chemical reaction is responsible for the reduction of iron(III) oxide to iron? Write the balanced chemical equation.
Explain the role of a reducing agent in the extraction of metals from their oxides, giving an example.
Explain why the extraction of copper from its sulphide ore is easier than from its oxide ore.
