(a)(i)   Draw and label a diagram to illustrate the preparation and collection of dry chlorine gas in the laboratory.
(ii)  State two uses of chlorine.
 

(b) Describe the preparation of hydrogen from water gas.

(i)   Name the chief ore of aluminium.

(ii)  Why is the ore purified?
(iii)  Name the electrode used in the electrolysis.
(iv)  Give one reason why cryolite, NaAlF\(_6\), is added to the electrolyte.
 

(c) Name three products obtained directly from the destructive distillation of coal.