Jamb Chemistry 2004 Past Questions and Answers

Question 1:

• JAMB 2004

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

A. Evaporation
B. Distillation
C. Crystallization
D. Sublimation

Question 2:

• JAMB 2004

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone

A. Evaporation
B. Distillation
C. Crystallization
D. Sublimation

Question 3:

• JAMB 2004

A chemical reaction is always associated with

A. An increase in the composition of one of the substance
B. A change in the volume of the reactants
C. A change in the nature of the reactants
D. The formation of new substance

Question 4:

• JAMB 2004

If a solution contains 4.9g of tetraoxosulphate (VI) acid, calculate the amount of copper (II) oxide that will react with it
[Cu = 64, O = 16, S = 32, H = 1]

A. 0.8g
B. 4.0g
C. 40.0g
D. 80.0g

Question 5:

• JAMB 2004

What volume of gas is evolved at S.t.p if 2g of calcium trioxocarbonate (IV) is added to a solution of hydrochloric acid?
[Ca = 40, C = 12, O = 16, Cl = 35.5, H = 1 Molar volume of agas at s.t.p = 22.4 dm³

A. 112 cm²
B. 224 cm²
C. 448 cm²
D. 2240 cm²