Chemistry Paper 2 WASSCE (PC), 2017


Candidates strengths in the paper were noticed in the following areas:


- 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.