Write balanced chemical equations for the following and identify the type of chemical reactions.
(i) Hydrogen iodide on reacting with chlorine gas give iodine and hydrochloric acid.
(ii) Methane gas bums in oxygen of air to form carbon dioxide and water.
(iii) On passing electric current through molten aluminium oxide, it decomposes to form aluminium metal and oxygen gas.
(i)
It is a redox reaction.
(ii)
It is an exothermic reaction.
(iii)
It is a decomposition reaction.