Post Utme University of Port Harcourt Chemistry Past Questions and Answers

Question 6:

Chemical substances are mentioned as
I. Sour taste
II. Slippery to touch
III. Yields alkaline gas with ammonium salts
IV. Has pH less than 7
V. Turns phenolphthalein pink

Which of the above are NOT typical properties of alkali?

A. I, IV and V
B. IV and \(V\)
C. I and IV
D. II and V
E. II, III and IV

Question 7:

The movement of liquid molecules from the surface of the liquid into gaseous phase is known as ____________

A. Brownian motion
B. Condensation
C. Evaporation
D. Liquefaction

Question 8:

Ammonia gas is normally dried with ____________

A. Concentrated sulphuric acid
B. Quicklime
C. Anhydrous calcium chloride
D. Magnesium sulphate

Question 9:

Oxygen demanding wastes a considered to be a water, pollutes because they; ____________

A. Deplete oxygen which necessary for the survival of aquatic organisms
B. Increase oxygen which necessary for the survival of aquatic organisms
C. Deplete other gaseous species which are necessary for the survival of aquatic organisms

Question 10:

Mortar is NOT used for underwater construction because ____________

A. It hardens by loss of water
B. Its hardening does not depend upon evaporation
C. It requires concrete to harden
D. It will be washed away the flow of water