Chemistry Paper 2 (Practical), WASSCE (PC 1ST), 2020

CANDIDATES’ STRENGTHS

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.