Post Utme Ebonyi State University Chemistry Past Questions and Answers

Question 6:

Which of these compounds exhibit resonance?

A. Benzene
B. Ethanol
C. Propene
D. Butyne

Question 7:

When a solid substance disappears completely as a gas on heating, the substances is said to have undergone ____________

A. Evaporation
B. Distillation
C. Crystallization
D. Sublimation

Question 8:

A chemical reaction is always associated with ____________

A. An increase in the composition of one of the substances
B. A change in the volume of the reactants
C. A change in the nature of the reactants
D. The formation of new substances

Question 9:

According to Charies's law, the volumes of a gas becomes zero at ____________

A. \(0^{\circ} \mathrm{C}\)
B. \(-100^{\circ} \mathrm{C}\)
C. \(-273^{\circ} \mathrm{C}\)
D. \(-373^{\circ} \mathrm{C}\)

Question 10:

It is difficult to achieve an orderly arrangement of the molecules of a gas because they ____________

A. Have no definite shape
B. Have little force of attraction between them
C. Can collide with one another in the container
D. Are too small in size