(a(i))[1]
Draw the displayed formula of an ethene molecule.
(a(ii))[2]
Incomplete combustion of ethene produces a small amount of carbon dioxide. Name two additional products of the incomplete combustion of ethene.
(b(i))[2]
Complete Fig. 4.1 to indicate the starting position of the mixture of coloured compounds on the chromatography paper and the solvent level at the start of the chromatography.
(b(ii))[2]
State two features of a mixture.