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Waec 2012 Chemistry Past QuestionsQuestion 31:Which of the following pH values indicates that a solution is a strong base? A. 1 B. 5 C. 9 D. 13 Question 32:The hydrolysis of NH\(_4\)CI gives A. An acidic solution B. An alkaline solution C. A buffer solution D. A neutral solution Question 33:A spot of oil paint on a shirt can best be removed using A. Brine B. Detergent C. Kerosine D. Warm water Question 34:Consider the reaction represented by the following equation: CuO\(_{(s)}\) + H\(_2\)SO\(_{4(aq)}\) → CuSO\(_{4(aq)}\) + H\(_2\)O\(_{(l)}\). Which of the following factors will not affect the rate of the reaction? A. Particle size of CuO(s) B. Concentration of H2SO4(aq) C. Temperature of the reacting mixture D. Pressure of reaction system Question 35:Which of the following devices function on redox reaction? l. Dry cell ll. Car battery III. Electric generator A. L and lll only B. Ll and lll only C. L and ll only D. L, ll and lll |
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