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Chemistry 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
1091
Complete hydrogenation of ethyne yields?
  • A. benzene
  • B. methane
  • C. ethane
  • D. ethene
  • E. propane
View Answer & Discuss (3) JAMB 1985
1092
Which of the following is used in the manufacture of bleaching powder?
  • A. Sulphur dioxide
  • B. Chlorine
  • C. Hydrogen tetraoxosulphate (VI)
  • D. Hydrogen sulphide
  • E. Nitrogen dioxide
View Answer & Discuss (4) JAMB 1985
1093
A man suspected of being drunk is made to pass his breath into acidified potassium dichlormate solution. If his breath carries a significant level of ethanol, the final colour of the solution is?
  • A. pink
  • B. purple
  • C. orange
  • D. blue-black
  • E. green
View Answer & Discuss (5) JAMB 1985
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1094
When pollen grains are suspended in water and viewed through a microscope, they appear to be in a state of constant but erratic motion. This is due to?
  • A. convection currents
  • B. small changes
  • C. small changes in temperature
  • D. a chemical reaction between the pollen grain and water
  • E. the bombardment of the pollen grains by molecules of water
View Answer & Discuss (4) JAMB 1985
1095
The energy change (ΔH) for the reaction CO(g) + (1)/(2)O2(g) → is?

(ΔHi(CO) = -110.4 kJ mol-) (ΔHi(CO2) = -393 kJ mol-)
  • A. -503.7 kJ
  • B. +503.7kJ
  • C. -282.9 kJ
  • D. +282.9 kJ
  • E. +393.3 kJ
View Answer & Discuss (7) JAMB 1985
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts