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

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

Dynamic equilibrium describes a situation where ______ (JAMB 2006)

A. a reaction gives back the reactants
B. reactants are converted to products
C. the concentration of reactants and products is equal
D. both forward and reverse reactions proceed at the same rate.

2SO₂ + O₂ ⇔ 2SO₃, ΔH = -xKJ

A decrease in temperature will ______ (JAMB 2019)

A. shift the equilibrium position backward
B. favour the forward reaction
C. decrease the formation of SO₃
D. increase the concentration of O₂

Cu²⁺_(aq) + 4NH_3(aq)  [Cu(NH₃)₄]²⁺

In the reaction above, what is the effect of precipitating Cu²⁺_(aq) as CuS_(s)? (JAMB 2007)

A. There will be no effect
B. The equilibrium will shift to the right
C. More NH_3(g) will be generated
D. NH_3(g) concentration will decrease

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