Chemistry Practice Test – Chemical Equilibrium (Questions with Answers and Explanations)

CuO_(s) + H_2(g)  Cu_(s) + H₂O_(l)

What is the effect of increasing the pressure on the equilibrium reaction above? (JAMB 2009)

A. The equilibrium is shifted to the left.
B. The equilibrium ¡s shifted to the right.
C. There is no effect.
D. More H_2(g) is produced.

The process that occurs when two equivalent form of a compound are in equilibrium is _____ (JAMB 2017)

A. isotopy   B. resonance    C. isomerism    D. reforming

Cr₂O^-2_7(aq) + H₂O_(l) 2CrO^-2_4(aq) + 2H_2(g)

What happens to the reaction above when the hydrogen ion concentration is increased? (JAMB 2014)

A. The equilibrium position will shift to the left
B. More of the products will be formed
C. The reaction will not proceed
D. The equilibrium position will shift to the right

In the reaction E + F  G + H, the backward reaction is favoured if the concentration of ____ (JAMB 2002)

A. E is reduced
B. G is reduced
C. F is increased
D. E is increased.

The equilibrium of an endothermic reaction which the evolution of oxygen with time in the equation proceeds with an increase in volume be shifted in the reverse direction by _____ (JAMB 2009)

A. increasing the temperature decreasing the pressure
B. increasing the pressure and decreasing the temperature
C. decreasing the temperature and increasing the pressure
D. decreasing the pressure and decreasing the temperature.