Jamb Chemistry 2009 Past Questions and Answers

Question 1:

• JAMB 2009

A mixture of sugar and sulphur can be separated by

A. Dissolution in water, evapouration and filtration
B. Filtration, evaporation and dissolution in water
C. Dissolution in water, filtration and evaporation
D. Evaporation, dissolution in water and filtration

Question 2:

• JAMB 2009

A mixture of sugar and sulphur can be separated by

A. Dissolution in water, evapouration and filtration
B. Filtration, evaporation and dissolution in water
C. Dissolution in water, filtration and evaporation
D. Evaporation, dissolution in water and filtration

Question 3:

• JAMB 2009

Which of the following is a physical change?

A. Freezing ice cream
B. Dissolving calcium in water
C. Burning kerosene
D. Exposing white phosphorus to air

Question 4:

• JAMB 2009

The percentage of water of crystallization in ZnSO₄.7H₂O is
[Zn = 65, S = 32, O = 1, H = 1]

A. 33%
B. 44%
C. 55%
D. 87%

Question 5:

• JAMB 2009

0.0075 mole of calcium trioxocarbonate (IV) is added to 0.015 mole of a solution of hydrochloric acid. The volume of gas evolved at s.t.p is
[Molar volume of a gas at s.t.p = 22.4 dm³]

A. 224cm³
B. 168cm³
C. 112cm³
D. 100cm³