Chemistry 2010 Waec Past Questions and Answers

Question 21 :

• WAEC 2010

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

A. NH₄NO_3(aq)
B. NaNO_3(aq)
C. Mg(NO₃)_2(aq)
D. AI(NO₃)_3(aq)

Question 22 :

• WAEC 2010

The following substances are normal salts except

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

Question 23 :

• WAEC 2010

Which of the following chlorides is insoluble in water?

A. AgCI
B. KCI
C. NH₄CI
D. ZnCI₂

Question 24 :

• WAEC 2010

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 :

• WAEC 2010

Consider the equilibrium reaction represented by the following equation: 2SO_2(g) + O_2(g) ⇌ 2SO_3(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