Question

(a) A to F below relate to the source and extraction of either zinc or aluminium:

A.Bauxite, B.Coke,

C. Cryolite D.Froth floatation, E.Sodium hydroxide solution, F.Zinc blende.

(i) Write down the three letters each from the above list which are relevant to:

1.Zinc, 2.Aluminium.

(ii) Fill in the blanks using the most appropriate words form A to F.

1.The ore from which aluminium is extracted must first be treated with ...................so that pure aluminium oxide can be obtained.

2.Pure aluminium oxide is dissolved in .............. to make a conducting solution.
(iii) Write the formula of cryolite.

Answer 1

(i)

1. Zinc: Froth Flotation, ZincBlende,Coke
2. Aluminium: Bauxite,Cryolite, Sodium hydroxide solution

(ii)

1. Sodium hydroxide.
2. Cryolite

(iii) The formula of Cryolite is Na₃AlF_6.