This is an example of combination reaction. A combination reaction is one in which or more reactants combine to form a single product (b) NaOH(aq)-CH3COOH(l) → CH3COONa(aq)+H2O(l) This is an example of neutralisation reaction between a strong base and weak acid. A neutralisation occurs between an acid and a base to form water and salt. This reaction releases H and OH' ions. It is also a double displacement reaction. In such reaction cations and anions of both reactants exchange their places (c) C2H5OH(aq)+CH3COOH) → CH3COOC2H(aq)+H2011) This is an example of neutralisation reaction as double displacement reaction. A neutralisation occurs between an acid and a base to form water and salt. This reaction releases and OH ions. It is also a double displacement reaction. In such reaction cations and anions of both reactants exchange their places. (d) C2H4(g)+302(9) → 2C02(g) + 2H2O(g)+Heat +Light This is an example of oxidation reaction. The reactant burns in oxygen to produce carbon dioxide and water. It is also an exothermic reaction as it evolves a lot of heat. It is also known as oxidation reaction.