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Chemistry Past Questions

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1201
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 (11) JAMB 1980
1202

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 (70) JAMB 1980
1203
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 (17) JAMB 1980
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1204

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 (13) JAMB 1980
1205
The reaction between sulphur (IV) oxide and oxygen is represented by the equilibrium reaction 2SO2(g) + O2(g) ↔ 2SO3(g), ∆H = -196 kJ. What factor would influence increased production of SO3(g)?
  • A. Addition of a suitable catalyst
  • B. Increase in the temperature of the reaction
  • C. Decrease in the temperature of the reaction
  • D. Decrease in the concentration of SO2(g)
View Answer & Discuss (4) JAMB 1987
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