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Chemistry 1989 JAMB Past Questions

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
21
The combustion of ethene, C 2H 4, is given by the equation C 2H 4 + 30 2 → 2CO2 + 2H2 O; ∆H = - 1428 KJ. If the molar heats of formation of water and carbon (IV) oxide are - 286 kJ and - 396 kJ respectively, calculate the molar heat of formation of ethene in KJ
  • A. - 2792
  • B. + 2792
  • C. - 64
  • D. + 64
View Answer & Discuss (8) JAMB 1989
22
Which of the following represents the balanced equation for the reaction of copper with concentrated trioxonitrate (V) acid?
  • A. Cu (s) + 2HNO 3(aq) → Cu (NO 3) 2(aq) + H 2(g)
  • B. Cu (s) + 4HNO 3(aq) → Cu (NO 3) 2(aq) + 2H 2O (1) + 2NO 2(g)
  • C. 3Cu (s) + 8HNO3(aq) → 3Cu (NO3)2(aq) + 4H2O(1) + 2NO(g)
  • D. 3Cu(s) + 4HNO3(aq) → 3Cu(NO 3) 2(aq) + 2H 2O (1) + 2NO (g)
View Answer & Discuss (9) JAMB 1989
23
The catalyst used in the contact process for the manufacture of tetraoxosulphate (VI) acid is
  • A. manganes (IV) oxide
  • B. manganese (ll) tetraoxosulphate (VI)
  • C. vanadium (V) oxide
  • D. iron metal
View Answer & Discuss (1) JAMB 1989
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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24

Some products of destructive distillation of coal are?

  • A. carbon (IV) oxide and ethanoic acid
  • B. trioxocarbonate (IV) acid and methanoic acid
  • C. producer gas and water gas
  • D. coke and ammoniacal liquor
View Answer & Discuss (7) JAMB 1989
25
Gunpower is made from charcoal, sulphur and potassium trioxonitrate (V) The salt in the mixture performs the function of
  • A. an oxidant
  • B. a reductant
  • C. a solvent
  • D. a catalyst
View Answer & Discuss (5) JAMB 1989
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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