Electrolysis and Extraction of Reactive Metals Quiz

What is the process by which we can separate ionic compounds into their pure elements?

• Oxidation

• Reduction

• Combustion

• Electrolysis

What is the cheap and easy way to reduce metals in their oxides for metals less reactive than carbon?

• Electrolysis

• Combustion

• Oxidation

• Reduction with carbon

For which type of metals do we have to rely on electrolysis instead of reduction with carbon?

• Metals with low melting points

• Metals more reactive than carbon

• Metals less reactive than carbon

• Metals with high melting points

What is the purpose of mixing aluminium oxide with cryolite before melting it?

• To increase the melting point

• To decrease the energy required for melting

• To increase the energy required for melting

• To decrease the melting point

What is the positive electrode called in the electrolysis setup?

• Electrolyte

• Cathode

• Conductor

• Anode

What is the negative electrode called in the electrolysis setup?

• Anode

• Electrolyte

• Conductor

• Cathode

What is the mnemonic used to remember that oxidation is loss of electrons and reduction is gain of electrons?

• OIL RIG

• SALT

• HOMES

• PEMDAS

What is being oxidized at the anode during the electrolysis of aluminium oxide?

• Cryolite

• Aluminium

• Oxygen

• Carbon

What is being reduced at the cathode during the electrolysis of aluminium oxide?

• Carbon

• Aluminium

• Oxygen

• Cryolite

What is the overall equation for the electrolysis of aluminium oxide?

• Aluminium oxide -> Oxygen + Aluminium

• Oxygen + Aluminium -> Aluminium oxide

• Aluminium oxide -> Aluminium + Oxygen

• Aluminium + Oxygen -> Aluminium oxide