Candidates’ were able to:

• List five steps in the treatment of water for town supply;
• Write the electron configuration of the elements listed;
• Calculate the number of moles of hydrogen ions in 1 dm3 of a 0.1 mol dm-3      
• Tetraoxosulphate (VI) acid solution;
• Draw the structures of two isomers of butene;
• State the IUPAC name of the isomers drawn in 3(a)(i);
• Describe a chemical test for CO2;
• State two conditions necessary for a high yield of ammonia;
• Give two uses of ammonia;
• List the major product(s) formed when carbon is burnt in limited air;
• State the method of collecting gases which are denser than air;
• Suggest two ways of reducing air pollution in our cities;
• Mention one source of water pollution.