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Chemistry 2012 WAEC Past Questions

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31

The hydrolysis of NH\(_4\)CI gives

  • A. an acidic solution
  • B. an alkaline solution
  • C. a buffer solution
  • D. a neutral solution
View Answer & Discuss WAEC 2012
32

A spot of oil paint on a shirt can best be removed using?

  • A. brine
  • B. detergent
  • C. kerosine
  • D. warm water
View Answer & Discuss (7) WAEC 2012
33

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
View Answer & Discuss (2) WAEC 2012
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34

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
View Answer & Discuss (3) WAEC 2012
35

The oxidation number of Fe in [Fe(CN)\(_6\)]\(^{3-}\) is

  • A. +3
  • B. +2
  • C. -2
  • D. -3
View Answer & Discuss (2) WAEC 2012
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Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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