(a)(i) State the two main processes involved in the manufacture of oxygen from air
(ii) Name the type of chemical bonding which exists between oxygen atoms in a molecule of oxygen
(b) What term is used to describe the relationship between oxygen and ozone (O(_3))?
Explanation
(a)(i) Liquefaction of air and fractional distillation of liquid air
(ii) covalent bonding.
(b) ozone is an allotrope of oxygen.