Uses of oxygen.
1. Respiration of plants and animals
2. Burning of fuels in house hold cooking, motor cars, airplanes, space rocket, e.t.c.
3. In welding of metals oxy-ethyne flame.
4. Divers, mountain climbers, and miners use it.
5. In the steel industry to remove carbon, sulphur, and phosphorus.
6. Manufacture of some important compounds.