The diagram shows the sketch of an electrolytic cell used in the extraction of aluminium.

Linked Question 1

At which electrode (A or B) is the aluminium formed?

A (Cathode)

At both A and B

B (Anode)

Cannot be determined

Aluminium ions receive electrons at the negative electrode(Cathode) and are reduced to aluminium atoms:

A³⁺ + 3e^– → Al (reduction – gain electrons)

The molten aluminium sinks to the bottom of the cell, where it is tapped off.

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Linked Question 2

What is the substance of which the electrodes A and B are made?

Zinc and copper

Copper and iron

None of the above

Carbon and graphite

The diagram shows an aluminium oxide electrolysis cell. Both the negative electrode (cathode) and the positive electrode (anode) are made of graphite, which is a form of carbon.

Hence, option A is correct.

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Linked Question 3

What are the two aluminium compounds present in the electrolyte C?

Pure alumina (Al₂O₃) and cryolite (Na₃AlF₆)

Cryolite, duralumin

Duralumin, magnalium

none of the above

The two aluminium compounds present in the electrolyte C are:

1. Pure Alumina (aluminium oxide) Al₂O₃ and

2. Cryolite (sodium aluminium fluoride) Na₃AlF.

Hence, option A is correct.

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