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Chemistry 2007 WAEC Past Questions

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16
Which of the following statements is true of the molecules of a gas under ideal conditions? The molecules
  • A. move at random
  • B. undergo inelastic collisions
  • C. attract each other
  • D. occupy a large volume
View Answer & Discuss WAEC 2007
17

In which of the following compound (s) will heat be absorbed on adding water?

l. KNO\(_3\) II. Concentrated H\(_2\)SO\(_4\) III. NH\(_4\)CI

  • A. I only
  • B. lll only
  • C. l and lll only
  • D. ll and lll only
View Answer & Discuss (3) WAEC 2007
18
Consider the reaction represented by the equation: Ca(OH)2(aq) + CO 2(g) → CaCO3(s) + H 2O(l)
in the reaction above, CO 2 acts as
  • A. an acidic oxide
  • B. an oxidizing agent
  • C. a basic oxide
  • D. a dehydrating agent
View Answer & Discuss (1) WAEC 2007
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19
Which of the following compounds is a basic salt?
  • A. Mg(NO3)2
  • B. (NH4)2SO4
  • C. K4Fe(CN)6
  • D. Zn(OH)CI
View Answer & Discuss (1) WAEC 2007
20

What process is illustrated below? S(s) ⇌H2O⇌ S (aq)

  • A. Decomposition of a solid
  • B. Melting of a solid
  • C. Formation of saturated solution of a solid
  • D. Sublimation of a solid
View Answer & Discuss (2) WAEC 2007
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