Post Utme Ahmadu Bello University Chemistry Past Questions and Answers

Question 6:

A substance which produces the hydroxonium ion as the only positive ion when dissolved in water is ____________

A. An acid
B. An acid salt
C. A normal salt
D. A base

Question 7:

Petrol can be obtained from fuel oil by ____________

A. Hydrolysis
B. Hydrogenation
C. Dehydration
D. Cracking

Question 8:

Which of the following is not true of metals?

A. They are good conductors of
heat and electricity
B. They are ductile and malleable
C. Their oxides are basic
D. They can be used as insulators

Question 9:

Which of the following is not a property of chlorine?

A. It is greenish yellow and has a choking smell
B. It bleaches litmus paper
C. It is a liquid at room temperature and pressure
D. It has a higher density than air

Question 10:

If calcium has atomic number 20 and mass number 40, the constituent of the atom is ____________

A. 20 protons, 10 neutrons and 10 electrons
B. 20 protons, 20 neutrons and 20 electrons
C. 20 protons, 20 neutrons and no electrons
D. 10 protons, 10 neutrons and 20 electrons