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Chemistry JAMB Past Questions

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941
Coal gas is made up of carbon (II) oxide, hydrogen and?
  • A. nitrogen
  • B. air
  • C. argon
  • D. methane
View Answer & Discuss (3) JAMB 1997
942
2X(aq) + MnO2(s) + 4H+(aq) → X2(g) + Mn2+(aq) + 2H2O.
The reaction above can be used for the laboratory preparation of all halogens except fluorine because it is?
  • A. a poisionous gas
  • B. an oxidizing agent
  • C. electronegative in nature
  • D. highly reactive
View Answer & Discuss (2) JAMB 1997
943

The removal of rust from iron by treatment with tetraoxosulphate (IV) acid is based on the?

  • A. hydrolysis of the iron
  • B. reaction of acid with base
  • C. oxidationof the rust
  • D. dehydration of the iron
View Answer & Discuss (24) JAMB 1997
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944
Which of the additives could improve the quality of steel?
  • A. Silicon
  • B. Sulphur and phosphorus
  • C. Carbon
  • D. Chromium and nickel
View Answer & Discuss (4) JAMB 1997
945
Sodium hydroxide is prepared commercially from sodium chloride solution by?
  • A. electrolysis using mercury as cathode
  • B. hydrolysis in steam using a catalyst
  • C. electrolysis using iron as anode
  • D. treating sodium chloride with ammonia and carbon (IV) oxide
View Answer & Discuss (2) JAMB 1997
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