Extraction of Aluminium Quiz

What material is used for both the anode and cathode in the extraction of aluminium?

• Iron

• Graphite

• Copper

• Aluminium

What is the primary raw material used as an electrolyte in the extraction of aluminium?

• Cryolite

• Magnesium Oxide

• Bauxite

• Sodium Chloride

Why is cryolite added to the bauxite during the extraction process?

• To increase the melting point of bauxite

• To reduce the melting point of bauxite

• To act as a catalyst

• To provide additional aluminium ions

What happens to aluminium ions at the cathode during the extraction process?

• They are oxidized to form aluminium oxide

• They are reduced to form aluminium metal

• They form aluminium chloride

• They remain unchanged

What gas is formed at the anode during the extraction of aluminium?

• Hydrogen

• Chlorine

• Oxygen

• Nitrogen

Why do carbon electrodes need to be replaced periodically in the extraction of aluminium?

• They become too heavy

• They burn due to high temperatures

• They react with aluminium ions

• They dissolve in the electrolyte

At what temperature do the carbon electrodes burn during the extraction process?

• 500°C

• 1500°C

• 980°C

• 1200°C

In the extraction of sodium, what material is used for the anode?

• Aluminium

• Graphite

• Iron

• Copper

What is formed at the anode during the extraction of sodium?

• Sodium metal

• Chlorine gas

• Oxygen gas

• Hydrogen gas

Which process uses graphite for both the anode and cathode?

• Extraction of sodium

• Extraction of iron

• Extraction of copper

• Extraction of aluminium