Jamb Chemistry Past Questions For Year 2009
Question 1
If the relative atomic mass of an element is not a whole number, it can be deduced that the element is?
- A. Naturally radioactive
- B. abundant in nature
- C. a transition metal
- D. an isotopic mixture
Question 2
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
The basic assumption in the kinetic theory of gases that the collisions of the gaseous molecules are perfectly elastic implies that the?
- A. forces of attraction and repulsion are in equilibrium
- B. gaseous molecules can occupy any available space
- C. gaseous molecules will continue their motion indefinitely
- D. gases can be compressed
Question 4
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
Question 5
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
