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Chemistry JAMB Past Questions

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1216
The efficiency of petrol as a fuel in high-compression internal combustion engines improves with an increase in the amount of?
  • A. branched chain alkanes
  • B. straight chain alkanes
  • C. cycloalkanes
  • D. halogenated hydrocarbons
View Answer & Discuss (4) JAMB 1987
1217

Ethanol reacts with aqueous sodium mono-oxoio date (l) to give a bright yellow solid with a characteristic smell. The product is?

  • A. trichloromethane
  • B. triodomethane
  • C. iodoethane
  • D. ethanal
View Answer & Discuss (11) JAMB 1987
1218
The most volatile fraction obtained from fractional distillation of crude petroleum contains?
  • A. butane , propane and kerosene
  • B. butane , propane and petrol
  • C. ethane, methane and benzene
  • D. methane, ethane and propane
View Answer & Discuss (3) JAMB 1987
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1219
Local black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the?
  • A. acid
  • B. ester of allanoic acid
  • C. alkali
  • D. alkanol
View Answer & Discuss (5) JAMB 1987
1220

Synthetic rubber is made by polymerization of 

  • A. 2 methyl buta - 1, 3 - diene
  • B. 2 methyl buta - 1, 2 - diene
  • C. 2 methyl but -1-ene
  • D. 2 methyl but-2-ene
View Answer & Discuss (10) JAMB 1987
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