Candidates' Weakness and Suggested Remedies

Candidates could not:
                                                                                                                        
-write a balanced equation for the overall cell reaction for an electrochemical cell
constructed with copper and silver electrodes;
- give correct observation for the reaction involving NaCl and AgNO3 on addition of ammonia solution and dilute HNO3;
-draw the diagram for preparation of dry oxygen gas as well as stating the source of N2 and H2 for the Haber’s process and the impurities in the materials;
-draw and label a diagram for the preparation of a dry sample of chlorine in the Laboratory;

- State the reason why metals are good conductors of electricity.

The following remedies were however suggested:

Candidates should
-           understand the demands of the questions before responding to them;
-           learn to explain concepts using appropriate technical terms;
-           ensure coverage of the syllabus before the commencement of examination;