describe and interpret, in terms of changes in oxidation number, the reaction of chlorine with cold and with hot aqueous sodium hydroxide and recognise these as disproportionation reactions
state and explain the variation in the oxidation number of the oxides (Na₂O, MgO, Al₂O₃, P₄O₁₀, SO₂ and SO₃ only) and chlorides (NaCl, MgCl₂, AlCl₃, SiCl₄, PCl₆ only) in terms of their outer shell (valence shell) electrons
describe the role of NO and NO\(_2\) in the formation of acid rain both directly and in their catalytic role in the oxidation of atmospheric sulfur dioxide