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Chemistry Past Questions

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936

2SO2(g) + O2(g) → 2SO3. In the reaction above, the standard heats of formation of SO2(g) and SO3(g) are -297 KJ mol-1 and -396 kJ/mol respectively. The heat change of the reaction is?

  • A. -99 kJ mol-
  • B. -198 kJ mol-
  • C. +198 kJ mol-
  • D. +683kJ mol-
View Answer & Discuss (12) JAMB 1997
937
If the rate law obtained for a given reaction is rate = k(X)n (Y)m, what is the overall order of the reaction?
  • A. nm
  • B. n/m
  • C. n + m
  • D. n - m
View Answer & Discuss (6) JAMB 1997
938
One method of driving the position of equilibrium of an endothermic reaction forward is to?
  • A. increase temperature at constant pressure
  • B. dcrease pressure at constant temperature
  • C. cool down the apparatus with water
  • D. decreases temperature at constant pressure
View Answer & Discuss (3) JAMB 1997
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939
Oxidation of concentrated hydrochloric acid with manganese (IV) oxide liberates a gas used in the?
  • A. manufacture of tooth pastes
  • B. treatment of simple golitre
  • C. vulcanization of rubber
  • D. sterilization of water
View Answer & Discuss (3) JAMB 1997
940
mE + nF → pG + qH. In the equation above, the equilibrium constant is given by?
  • A. (E)m(F)n/ (G)n(H)q
  • B. (E)(F) / (G)(H)
  • C. (G)p(H)q / (E)m(F)n
  • D. (G)(H) / (E)(F)
View Answer & Discuss (4) JAMB 1997
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