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Chemistry 1980 JAMB Past Questions

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31
If one of the following oxides is heated with hydrogen or carbon using a bunsen burner, it is not reduced to the metal. Which one is it?
  • A. Lead oxide
  • B. Magnesium oxide
  • C. Copper oxide
  • D. Tin oxide
  • E. Iron oxide
View Answer & Discuss (7) JAMB 1980
32

Which of the following statement is false?

  • A. Acids react with some metals, liberating hydrogen
  • B. Acids react with carbonates, liberating carbondioxide
  • C. Acids conduct electricity and are decomposed by the current, liberating hydrogen at the anode
  • D. Acids have a sour taste
  • E. Acids change the colour of indicators
View Answer & Discuss (24) JAMB 1980
33
A mixture of ethanol, sodium dichromate, and water is allowed to drop gradually into a boiling solution containing one part concentrated H2SO
4 and the liberate gas is collected by cooling it with ice water to give a liquid. This liquid is?
  • A. ethanoic acid
  • B. acetaldehyde
  • C. ethyl acetate
  • D. methanol
  • E. ethylene
View Answer & Discuss (8) JAMB 1980
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34

When chlorine gas is passed into a solution of sulphur dioxide?

  • A. sulphur dioxide is reduced to sulphur
  • B. the chlorine is oxidized to hydrochloric acid
  • C. dilute sulphuric acid and hydrochloric acid are produced
  • D. Hydrochloric acid and sulphur are produced
  • E. sulphur trioxide is the only product
View Answer & Discuss (3) JAMB 1980
35

In the above experiment X is?

  • A. pure nitrogen
  • B. a mixture of nitrogen and oxygen
  • C. a mixture of nitrogen and carbondioxide
  • D. a mixture of oxygen and inert gases
  • E. a mixture of nitrogen and inert gases
View Answer & Discuss (9) JAMB 1980
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free