Post Utme Abia State University Chemistry Past Questions and Answers

Question 11:

A mixture of sugar and sulphur can be separated by ____________

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

Question 12:

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 13:

The percentage of water of crystallization in \(\mathrm{ZnSO}_{4} .7 \mathrm{H}_{2} \mathrm{O}\) is ____________

A. \(33 \%\)
B. \(44 \%\)
C. \(55 \%\)
D. \(87 \%\)

Question 14:

A gas exert pressure on its container because ____________

A. The molecules of gas collide with thewall 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 15:

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 an avallable space
C. Gaseous molecules will continue their motion indefinitely
D. Gas can be compress