Post Utme University of Calabar Chemistry Past Questions and Answers

Question 1:

What current in ampere will deposit 0.27g of aluminium in 2 hours? [Al=27, F=96500C].

A. 3.2
B. 8
C. 0.4
D. 16

Question 2:

What is the likely formula of a ompound formed between element M in group 2 and between element X in group 7?

A. \(M_7X_2\)
B. \(MX_2\)
C. M₂X7
D. M₂X

Question 3:

Which of the following can be explained by the kinetic theory?
I. The physical state of matter
II. Diffusion of gases of liquids
III. Melting of solid
IV. Evaporation

A. IV
B. I & II
C. III & IV
D. I, II & III
E. I, II, III & IV

Question 4:

The properties of electrovalent compounds include the following except ____________

A. High melting point and boiling point
B. Conduction of electricity in the molten state
C. High volatility at room temperature
D. Ionization in aqueous solution
E. Decomposition of their solutions by electric current

Question 5:

Which of the following statements is not correct about electrolysis?

A. Reduction occurs at the anode
B. Anions migrate to the anode
C. Positive ions migrate to the cathode
D. Concentration affects the discharge of ions
E. Electrolysis conduct electric current