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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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.
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.
Which of the following is a chemical method of concentration of ore?
(1) Froth flotation
(2) Leaching
(3) Magnetic separation
(4) Hand picking
Which of the following is a method of physical separation of ore?
(1) Leaching
(2) Froth flotation
(3) Electrolytic refining
(4) Roasting
Which of the following is an ore of iron?
(1) Bauxite
(2) Hematite
(3) Galena
(4) Malachite
Which of the following is not a method of refining metals?
(1) Distillation
(2) Electrolytic refining
(3) Zone refining
(4) Roasting
During the extraction of iron, limestone acts as a ________.
Fill in the blank: The ore of mercury is _________.
Fill in the blank: The slag formed during the extraction of iron from haematite is _________.
In the electrolytic refining of copper, the pure copper is deposited at the _________.
State whether the following statement is true or false: 'Gangue is the pure form of the ore.'
State whether the following statement is true or false: 'Zone refining is used to obtain highly pure metals.'
True or False: Highly reactive metals are usually extracted by reduction with carbon.
True or False: Roasting is a process used to convert sulphide ores into oxides.
