Aluminium Extraction Quiz

Why is electrolysis used to extract aluminium instead of using carbon?

• Carbon is too expensive to use.

• Electrolysis is a faster process.

• Aluminium is more reactive than carbon.

• Aluminium is less reactive than carbon.

What is the charge on aluminium ions in aluminium oxide?

• 3+

• 3-

• 2-

• 2+

What is the purpose of melting aluminium oxide during electrolysis?

• To increase its density.

• To make it more reactive.

• To allow ions to move freely.

• To change its color.

How does cryolite help in the extraction of aluminium?

• It increases the melting point of aluminium oxide.

• It reduces the melting point of aluminium oxide.

• It acts as a catalyst in the reaction.

• It prevents the formation of carbon dioxide.

What are the two main products of the electrolysis of aluminium oxide?

• Aluminium and carbon monoxide

• Aluminium and hydrogen

• Aluminium and oxygen

• Oxygen and carbon dioxide