Chemistry 2009 JAMB Past Questions

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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

View Answer & Discuss (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

View Answer & Discuss (5) JAMB 2009

The percentage of water of crystallization in ZnSO\(_4\).7H\(_2\)O is?
[Zn = 65, S = 32, O = 16, H = 1]

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

View Answer & Discuss (12) 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

View Answer & Discuss (10) JAMB 2009

A gas exerts pressure on its container because?

A. the molecules of a gas collide with the walls of the container
B. some of the molecules are moving faster than others
C. of the collisions of the molecules with each other
D. of the mass of the molecules of the gas

View Answer & Discuss (2) JAMB 2009

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Chemistry 2009 JAMB Past Questions

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