Post Utme University of Ibadan Chemistry Past Questions and Answers

Question 6:

A charged car battery has ____________ energy that can be converted into another energy called energy

A. Chemical, electrical
B. Mechanical, chemical
C. Heat, mechanical
D. Light, electrical
E. Light, heat

Question 7:

Copper oxide is heated with charcoal to produce carbon monoxide and copper. The reaction is an example of ____________

A. Both oxidation and reduction
B. Neither oxidation and reduction
C. Oxidation only
D. Reduction only
E. Neutralization

Question 8:

For each oxygen atom in hydrogen peroxide which acts as an oxidant, there is an oxygen atom which acts as a /an ____________

A. Oxidant
B. Reductant
C. Oxidizing agent
D. Catalyst
E. Inhibitor

Question 9:

Given the change of phase: \(\mathrm{CO}_{2}(\mathrm{~g})\) changes to \(\mathrm{CO}_{2}(\mathrm{~s})\), the entropy of the system

A. Decreases
B. Increases
C. Remains the same
D. None of the above.

Question 10:

In which of the following is the entropy change positive?

A. Reaction between an acid and a base.
B. Addition of concentrated acid to water.
C. Dissolution of sodium metal in water.
D. Thermal dissociation of ammonium chloride.