2021 WAEC Chemistry Practical, Candidate’s Weakness And Improvements

2021 WAEC Chemistry Practical Candidates’ Weakness and Suggested Remedies

Candidates

• did not show basic understanding of simple concepts in Chemistry;

 

• did not adhere to instructions as they relate to each question;

 

• exhibited poor communication skill;

 

• could not correctly define fermentation reaction;

 

• wrote the formula of acid instead of name;

 

• could not draw the graphical illustration of Charles’ law correctly;

 

• could not write complete definition when required;

 

• could not explain the chemistry behind the rate of corrosion of tin coated plate and a galvanized plate;

 

• could not name two factors which determine the choice of an indicator for an acid-base titration;

 

• could not draw and label a diagram for the laboratory preparation of a dry sample of sulphur(IV)oxide.

 

The Following Remedies Were Suggested For Overcoming The Weaknesses

Candidates should:

• identify the basic requirements of each question before answering;

 

• learn to use the appropriate technical terms when required;

 

• improve on their communication skills;

 

• write correct and complete definitions when required;

 

• be familiar with the examination syllabus;

 

• learn how to write and balance chemical equations correctly;

 

• learn how to write IUPAC names of compounds correctly;

 

• improve on their study habit.

Candidate’s Strength

Candidates

• correctly named the catalyst used for fermentation;

 

• gave the names of heavy chemicals;

 

• listed properties of aluminium;

 

• correctly defined esterification reaction;

 

• mentioned the uses of alkyl alkanoates;

 

• named ore of iron;

 

• described acidic reaction on litmus paper;

 

• gave two disadvantages of hardness in water;

 

• correctly wrote the equation of reaction of calcium oxide with water;

 

• correctly stated Dalton’s Law of Partial Pressure;

 

• correctly used collision theory to explain the effect of temperature.

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