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Chemistry 1993 JAMB Past Questions

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31
The fraction of crude oil used as jet fuel is?
  • A. refinery gas
  • B. diesel oil
  • C. kerosene
  • D. gasoline
View Answer & Discuss (5) JAMB 1993
32
It is not desirable to use lead tetraethyl as an anti-knock agent because?
  • A. it is expensive
  • B. of pollution effects from the exhaust fumes
  • C. it lowers the octane rating of petrol
  • D. it is explosive
View Answer & Discuss (1) JAMB 1993
33
Al2O3(s) + 3H2SO4(aq) → Al2(SO4(aq)) + 3H2(I)O
Al2O3(s) + 2NaOH(aq)) + 3H2(I)O → 2NaAl(OH)4(aq)).
We can conclude from the equations above that Al2O3(s) is?
  • A. an acidic oxide
  • B. an amphoteric oxide
  • C. a basic oxide
  • D. a neutral oxide
View Answer & Discuss (1) JAMB 1993
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34
The carbon atoms on ethane are?
  • A. sp2 hybridized
  • B. sp3 hybridized
  • C. sp2d hybridized
  • D. sp hybridized
View Answer & Discuss (7) JAMB 1993
35
Palm wine turns sour with time because?
  • A. the sugar content is converted into alcohol
  • B. the carbon (IV) oxide formed during the fermentation process has a sour taste
  • C. it is commonly adulterated by the tappers and sellers
  • D. microbial activity results in the production of orgain acids within it
View Answer & Discuss (2) JAMB 1993
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