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1811
''The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants''. This statement is associated with the
  • A. Kinetic theory
  • B. rate law
  • C. atomic theory
  • D. collision theory
  • E. gas laws
View Answer & Discuss WAEC 1992
1812
What is the following compounds will not decompose when heated strongly ?
  • A. NaHCO3
  • B. K2CO3
  • C. MgCO3
  • D. Ca(HCO3)2
  • E. ZnCO3
View Answer & Discuss (1) WAEC 1992
1813
What is the change in the oxidation number of phosphorus in the the reaction represented by the following equation? 4P (s) + 5O(2)(g) → 2P2O5(g)
  • A. 0 to + 2
  • B. 0 to 5
  • C. +4 to + 2
  • D. +4 to +5
  • E. +4 to +7
View Answer & Discuss WAEC 1992
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1814
When iron rusts, it undergoes
  • A. deliquescence
  • B. chemical decomposition
  • C. hydrolysis
  • D. redox reaction
  • E. combustion
View Answer & Discuss (2) WAEC 1992
1815
Consider the compounds represented by the following general formula: X2SO4 Y2(SO4)3, 24H2OX and Y could respectively be
  • A. K and AI
  • B. Fe and K
  • C. AI and Fe
  • D. AI and K
  • E. Cr and K
View Answer & Discuss WAEC 1992
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