Jamb Chemistry 2003 Past Questions and Answers

Question 1:

• JAMB 2003

What volume of oxygen is produced from the decomposition of 2 mole of KCIO₃ at s.t.p?
[Molar volume of a gas at s.t.p = 22.4 dm³]

A. 22.4 dm³
B. 33.6 dm³
C. 44.8 dm³
D. 67.2 dm³

Question 2:

• JAMB 2003

What volume of oxygen is produced from the decomposition of 2 mole of KCIO₃ at s.t.p?
[Molar volume of a gas at s.t.p = 22.4 dm³]

A. 22.4 dm³
B. 33.6 dm³
C. 44.8 dm³
D. 67.2 dm³

Question 3:

• JAMB 2003

Which of the following is physical change?

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

Question 4:

• JAMB 2003

What is the percentage by mass of oxygen in Al₂(SO₄)₃. 2H₂O?
[Al = 27, S = 32, H = 1, O = 16]

A. 14.29%
B. 25.39%
C. 50.79%
D. 59.25%

Question 5:

• JAMB 2003

The filter in the cigarette reduces the nicotine content by

A. Burning
B. Adsorption
C. Evaporation
D. Absorption