(a) Combustion reaction: Carbon compounds burns in oxygen to produce carbon dioxide along with release of large amount of heat and light.
CH4 + 2O2 ------> CO2 + 2H2O +Heat and light
(b) Oxidation reaction: Ethanol is oxidised to ethanoic acid in the presence of alkaline KMnO4 b(oxidising agent) on heating.
(c) Substitution reaction: In the presence of sunlight, chlorine replaces the hydrogen atom of hydrocarbons.
CH4 + Cl2 ---->hv CH3Cl + HCl
