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Chemistry 2014 WAEC Past Questions

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26
Which of the following salts on hydrolysis would give an alkaline solution?
  • A. NH4CI(s)
  • B. AICI3(s)
  • C. CH3COONa(s)
  • D. NH4NO3(s)
View Answer & Discuss WAEC 2014
27
Consider the reaction represented by the following equation: Na2CO3(aq) + 2HCl(aq) \(\longrightarrow\) 2NaCl(aq) + H2O(l) + CO2(g) . What volume of 0.02 mol dm-3 Na2CO3(aq) would be required to completely neutralize 40 cm3 of 0.10 mol dm-3 HCl(aq)?
  • A. 200 cm3
  • B. 100 cm3
  • C. 40 cm3
  • D. 20 cm3
View Answer & Discuss (8) WAEC 2014
28
Which of the following factors would affect the equilibrium constant?
  • A. Concentration
  • B. Temperature
  • C. Pressure
  • D. Volume
View Answer & Discuss (3) WAEC 2014
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29
Consider the reaction represented by the following equation: N2(g) + 3H2(g) ⇌ 2NH3(g); ∆Hϴ = -xkJ mol-1. Which of the following conditions would increase the yield of NH3?
  • A. Addition of iron catalyst
  • B. Increase in the temperature of the system
  • C. Increase in the volume occupied by reactants
  • D. Increase in the total pressure of the system
View Answer & Discuss (5) WAEC 2014
30
The reaction that occurs all the anode when CuSO4(aq) is electrolyzed using carbon electrode is
  • A. 2H - (aq) + 2e → H 2(g)
  • B. Cu2+ (aq) + 2e → Cu (s)
  • C. 4OH (aq) -4e → 2H2O(l) + O2 (g)
  • D. SO4(aq)2 -2e → SO 2(g) + O2(g)
View Answer & Discuss (5) WAEC 2014
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