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Chemistry 1993 WAEC Past Questions

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26
Producer gas is a mixture of
  • A. oxygen and hydrogen
  • B. Hydrogen and nitrogen
  • C. nitrogen and oxygen
  • D. nitrogen and carbon (ll) oxide
  • E. hydrogen and carbon (ll) oxide
View Answer & Discuss (3) WAEC 1993
27
An alkene may be converted to an alkane by
  • A. halogenation
  • B. hydrolysis
  • C. dehydration
  • D. hydrogenation
  • E. decomposition
View Answer & Discuss (1) WAEC 1993
28
Which of the following gases are diatomic except
  • A. nitrogen
  • B. helium
  • C. hydrogen
  • D. fluorine
  • E. oxygen
View Answer & Discuss (1) WAEC 1993
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29
Which of the following is correct about the electrons in the 1s orbital? They
  • A. have the same spin
  • B. are easier to remove than those in the 2p orbital
  • C. are closest to the nucleus
  • D. have the same energy as those in the 2s orbital
  • E. have different magnetic quantum numbers
View Answer & Discuss WAEC 1993
30
The product of the reaction between ethanol and excess acidified K2Cr2O2 is
  • A. ethanal
  • B. ethylethanoate
  • C. ethanoic acid
  • D. ethyne
  • E. ethanedioic acid
View Answer & Discuss (6) WAEC 1993
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