(i) The following questions relate to the extraction of Aluminium by electrolysis. (a) Name the other aluminium containing compound added to alumina. (b) Give a balanced equation for the reaction that takes place at the cathode. (ii) Pratik heated 11.2 grams of element ‘M’ (atomic weight 56) with 4.8 grams of element ‘N’ (atomic weight 16) to form a compound. Find the empirical formula of the compound obtained by Pratik. (iii) Give balanced equations for each of the following: (a) Action of warm water on Aluminium nitride. (b) Oxidation of carbon with conc. Nitric acid. (c) Laboratory preparation of ethanol by using chloroethane and aqueous sodium hydroxide. (iv) The diagram given below is a representation of the Industrial preparation of Nitric acid by Ostwald’s process. With respect to the process answer the following questions: (a) Write the temperature and the catalyst required during the catalytic oxidation of ammonia. (b) Give balanced chemical equation for the reaction occurring during the conversion of nitrogen dioxide to nitric acid.
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