Question

The diagram shows the sketch of an electrolytic cell used in the extraction of aluminium. What are the two aluminium compounds present in the electrolyte C?

• A. Pure alumina (Al${}_2$O${}_3$) and cryolite (Na${}_3$AlF${}_6$)
• B. Duralumin, magnalium
• C. Cryolite, duralumin
• D. none of the above

Answer 1

The correct option is A Pure alumina (Al${}_2$O${}_3$) and cryolite (Na${}_3$AlF${}_6$)

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.