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Waec Chemistry 2010 Past Questions and Answers

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Waec 2010 Chemistry Past Questions

Question 21:


Which of the following equimolar solutions would have the highest conductivity?

A. NH4NO3(aq)
B. NaNO3(aq)
C. Mg(NO3)2(aq)
D. AI(NO3)3(aq)


Question 22:


The following substances are normal salts except

A. AI(NO3)3
B. FeSO4
C. Mg(OH)NO3
D. NaCI


Question 23:


Which of the following chlorides is insoluble in water?

A. AgCI
B. KCI
C. NH4CI
D. ZnCI2


Question 24:


Which of the following factors would not affect the solubility of a gas?

A. Concentration
B. Nature of solvent
C. Pressure
D. Temperature


Question 25:


Consider the equilibrium reaction represented by the following equation: 2SO2(g) + O2(g) ⇌ 2SO3(g); ∆H = 395.7 kJmol-1 Which of the following statements about the equilibrium system is correct?

A. Addition of catalyst changes the equailibrium position
B. Decrease in pressure increase in temperature SO3
C. Decrease in pressure increases the equilibrium concentration of O2
D. Increase in temperatur favours the forward reaction






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