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Chemistry 1987 JAMB Past Questions

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11
Inspite of the electronic configuration, 1s22s22p2, carbon is tetraavalent because?
  • A. the electrons in both 2s and 2p orbitals have equal energy
  • B. the electrons in both 2s and 2p orbitals are equivalent
  • C. both the 2s and 2p orbitals hybridizes
  • D. the six orbitals hybridize to four
View Answer & Discuss (7) JAMB 1987
12
Which of the following compounds will give a precipitate with an aqueous ammoniacal solution of copper (l) chloride?
  • A. CH3 = CHCH3
  • B. CH3 ≡ CCH3
  • C. HC = C-CH2CH3
  • D. CH2 = CH-CH = CH2
View Answer & Discuss (12) JAMB 1987
13
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
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14

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
15
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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