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Chemistry 1995 JAMB Past Questions

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26

In the industrial production of hydrogen from natural gas, carbon (IV) oxide produced along with the hydrogen is removed by?

  • A. washing with water under pressure
  • B. passing the mixture into lime water
  • C. using ammoniacal copper (l) chloride
  • D. drying over phoshorus (V) oxide
View Answer & Discuss (7) JAMB 1995
27
Sulphur exists in six forms in the solid state. This property is known as?
  • A. isomerism
  • B. allotropy
  • C. isotopy
  • D. isomorphism
View Answer & Discuss JAMB 1995
28
A gas that will turn orange potassium heptaoxodichromate (lV) solution to clear green is?
  • A. sulphur (lV) oxide
  • B. hydrogen sulphide
  • C. sulphide (lV) oxide
  • D. hydrogen chloride
View Answer & Discuss (10) JAMB 1995
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29
Which of the following ions will give a white precipitate with aqueous NaOH and soluble in excess of the base?
  • A. Ca2+
  • B. Mg2+
  • C. Zn2+
  • D. Cu2+
View Answer & Discuss JAMB 1995
30
In the extraction of iron in the blast furnace, limestone is used to?
  • A. release CO2 for the reaction
  • B. reduce the iron ore
  • C. increase the strenght of the iron
  • D. remove impurities
View Answer & Discuss (2) JAMB 1995
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