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Chemistry 1987 JAMB Past Questions

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6
When sodium hydroxide is heated with ammonium tetraoxosulphate (IV), the gas given off may be collected by?
  • A. bubbling it through concentrated H2SO2
  • B. bubbling it through water and then passing it through calcium oxide
  • C. passing it directly through calcium oxide
  • D. passing it directly through calcium chloride
View Answer & Discuss (5) JAMB 1987
7
Which of the following elements will form oxide which will dissolve both in dilute HNO3 and NaOH solutions to form salts?
  • A. Al
  • B. Mg
  • C. Ag
  • D. Mn
View Answer & Discuss (7) JAMB 1987
8
Stainless steel is an alloy of?
  • A. Iron, carbon and silver
  • B. iron, carbon and lead
  • C. iron, carbon and chromium
  • D. iron and carbon only
View Answer & Discuss (3) JAMB 1987
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9
Alloys are best prepared by?
  • A. high temperature weilding of the metals
  • B. electrolysis using the major metallic component as cathode
  • C. reducing a mixture of the oxies of the elements
  • D. cooling a molten mixture of the necessary elements
View Answer & Discuss (3) JAMB 1987
10
Corrosion is exhibited by?
  • A. iron only
  • B. electropostive metals
  • C. metals below hydrogen inthe electrochemical series
  • D. all metals
View Answer & Discuss (18) JAMB 1987
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