Chemical equilibrium - Jamb Chemistry Past Questions and Answers

Question 21:

• JAMB 2002

Which of the following equations show that a reaction is in equilibrium?

A. ΔG < O
B. ΔG = ΔH – TΔS
C. ΔG > O
D. ΔG = O

Question 22:

• 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 23:

• 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 24:

• JAMB 2003

When at equilibrium, which of the reactions below will shift to the right if the pressure is increased and the temperature is kept constant?

A. 2SO_3(g) ↔ 2SO_2(g) + O_2(g)
B. 2CO_2(g) ↔ 2CO_(g) + O_2(g)
C. 2H_2(g) + O_2(g) ↔ 2H₂O_(g)
D. 2NO_(g) ↔ N_2(g) + O_2(g)

Question 25:

• JAMB 2005

The air around smelting industries is likely to contain

A. H₂S, CO and N₂
B. CO₂, SO₃ and H₂
C. H₂, SO₂ and CO₂
D. SO₂, N₂ and CO₂