Jamb Chemistry Past Questions and Answers

Question 2021:

• JAMB 2018

The end products of burning a candle in the atmosphere are water and

A. Carbon (II) oxide
B. Sulphur (IV) oxide
C. Carbon (IV) oxide
D. Sulphur (VI) oxide

Question 2022:

• JAMB 2018

The collision theory explains reaction rates in terms of

A. Size of the product
B. Frequency of collision of the reactants
C. Size of reactant
D. Frequency of collision of the products

Question 2023:

• JAMB 2018

The presence of ammonia gas in a desiccator can exclusively be removed by

A. Phosphorus (V) oxide
B. Fused calcium chloride
C. Calcium chloride
D. Concentrated tetraoxosulphate (VI) acid

Question 2024:

• JAMB 2018

Aluminium does not react with either dilute or concentrated trioxonitrate (V) acid because

A. It is insoluble in either dilute or concentrated trioxonitrate (V) acid
B. It is lower than hydrogen in the electrochemical series
C. The reaction with trioxonitrate (V) acid has a light activation energy
D. An insoluble oxide is formed on its surface which renders it passive

Question 2025:

• JAMB 2018

Which of these sources of water may likely contain the least concentration of Ca\(^{2+}\) and Mg\(^{2+}\)?

A. Spring water
B. River water
C. Tap water
D. Sea water