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Chemistry 2001 WAEC Past Questions

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31
Which of the following constitutes an advantage in the use of hard water?
  • A. Formation of scum with soap
  • B. Furring of kettles
  • C. Blockage of water pipes
  • D. Formation of strong bones
View Answer & Discuss (3) WAEC 2001
32

Sugars can be hydrolyzed at room temperature by the action of

  • A. mineral acids
  • B. strong bases
  • C. enzymes
  • D. oxidants
View Answer & Discuss (4) WAEC 2001
33
If 10 cm 3 of distilled water is added to 10 cm3 of an aqueous salt solution, the concentration of the solution
  • A. increases
  • B. decreases
  • C. remains constant
  • D. doubles
View Answer & Discuss WAEC 2001
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34
Which of the following reactions represents the change that occurs when a photographic film is exposed to sunlight?
  • A. Ag → Ag+ + e-
  • B. Ag+ + e- → Ag
  • C. 2Ag + Br22 → AgBr
  • D. Ag+ + Br- → AgBr
View Answer & Discuss (1) WAEC 2001
35
Acidic industrial waste can be treated with
  • A. lime
  • B. brine
  • C. water
  • D. enthanol
View Answer & Discuss (4) WAEC 2001
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