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Chemistry Past Questions

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1

Carbon exist naturally in the combined state as?

  • A. graphite
  • B. coal
  • C. diamond
  • D. wood
View Answer & Discuss (27) JAMB 2006
2

Which of the following allotrope of carbon is a constituent of a lead pencil?

  • A. Graphite
  • B. Diamond
  • C. Lampblack
  • D. Soot
View Answer & Discuss (7) JAMB 2009
3

Carbon (II) oxide is considered dangerous if inhaled mainly because it?

  • A. can cause injury to the nervous system
  • B. competes with oxygen in the blood
  • C. competes with carbon (IV) oxide in the blood
  • D. can cause lung cancer
View Answer & Discuss (6) JAMB 2010
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4

Water gas is a mixture of?

  • A. CO2 and H2
  • B. CO and H2O
  • C. CO2 and CO
  • D. CO and N2
  • E. CO and H2
View Answer & Discuss (6) WAEC 1988
5

Carbon is often deposited in the exhaust-pipe of cars because of the?

  • A. presence of carbon in petrol
  • B. dehydrogenation of petrol
  • C. incomplete combustion of petrol
  • D. presence of additives in petrol
  • E. contamination of petrol with diesel
View Answer & Discuss (6) WAEC 1993
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