Jamb Chemistry 2003 Past Questions and Answers

Question 21:

• JAMB 2003

A change in temperature of a saturated solution disturb the equilibrium between the

A. Dissolved solute and the solvent
B. Solvent and undissolved solute
C. Dissolved solute and undissolved solute
D. Dissolved solute and the solution

Question 22:

• JAMB 2003

If an equilibrium reaction has ΔH > 0, the reaction will proceed favourably in the forward direction at

A. High temperature
B. Any temperature
C. Low temperature
D. Minimum temperature

Question 23:

• JAMB 2003

The commonest feature of reactions at the anode is that

A. Electrons are consumed
B. Oxidation is involved
C. Ions are reduced
D. Electrode dissolves

Question 24:

• JAMB 2003

Which of the following will change when a catalyst is added to a chemical reaction?

A. The activation energy
B. The potential energy of the reactants
C. The heat of the reaction
D. The potential energy of the product

Question 25:

• JAMB 2003

If y is an oxidizing agent that reacts with a reducing agent, Z, which of the following is correct?

A. Y increases in oxidation number
B. Y becomes reduced
C. Z loses protons
D. Z gains protons