Post Utme Federal University of Technology, Owerri Chemistry Past Questions and Answers

Question 6:

Under high pressure, real gases do not obey gas laws because their molecules ____________

A. Have become more energetic
B. Have become less energetic
C. Have become smaller in size
D. Decompose into atoms
E. Start repelling each other

Question 7:

Which of the following statements is an exception in the assumptions of the kinetic theory of gases?

A. Gases are composed of many elastic particles
B. The particles are of negligible size
C. The particles are in constant random motion
D. The particles are of negligible mass
E. The particles collide with each other

Question 8:

\(5.00 g\) of hydrated salt of barium when heated to a constant weight gave \(4.26 g\) of anhydrous salt with a molecular weight of 208. The number of molecules of water of crystallization in the hydrated salt is ____________

A. 10
B. 7
C. 5
D. 2

Question 9:

Oxidation is the process of ____________

A. Gain of electrons
B. Loss of electrons
C. Gain of hydrogen
D. Loss of oxygen
E. Addition of an electropositive element to a substance

Question 10:

Which of the following statement is NOT true of the electrovalent compounds?

A. They are solids
B. They do not ' vaporize easily
C. They usually dissolve in water
D. The elements orbiting the compounds normally have their valence electrons in a shared state
E. They conduct electricity