CANDIDATES’ STRENGTHS
Candidates strengths in the paper were noticed in the following areas:
Candidates
- stated the reason why diamond is used as an abrasive;;
- explained a chemical change;
- defined isotopes correctly;
- differentiated between a weak acid and a dilute acid;
- stated the method used to obtain pure ethanol from aqueous mixture;
- wrote the reaction equation for the decomposition of CaCO3;
- mentioned gases that should be prepared in the fume chambers;
- stated the postulates of the kinetic theory of gases;.
- stated three applications of electrolysis correctly;
- stated one use of fused calcium chloride;
- explained why ammonia cannot be dried with concentrated tetraoxosulphate (VI) acid.