Chromatography
Sublimation
Fractional distillation
Any of them
Oxyegn
Carbon dioxide
Hydrogen chloride
Nitrogen dioxide
Ammonia
Chlorine
Urea
Sulphur di-oxide
Sodium
Magnesium
Potassium
None of these
Gas
Solid
Liquid
Petrol
Hydrogen
Oxygen
L.P.G.
Van’t Hoff
Lewis
Ostwald
Raoult
Cryolite
Haematite
Bauxite
Felspar
5%
15%
35%
55%
Kalium
Ferrum
Cuprum
Natrium