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Chemistry 1981 JAMB Past Questions

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1

An element X has 127 neutrons and 82 electrons.
Its atomic number is?

  • A. 209
  • B. 105
  • C. 45
  • D. 82
View Answer & Discuss (11) JAMB 1981
2
When a bottle of Coca-Cola is opened, bubbles of evolve. The gas is?
  • A. hydrogen
  • B. carbon monoxide
  • C. carbon dioxide
  • D. sulphur oxide
  • E. chlorine
View Answer & Discuss (1) JAMB 1981
3

When glowing splint is inserted into the mouth of a jar containing a gas, the splint is extinguished. The gas gives a white precipitate when passing into barium hydroxide. The gas is?

  • A. methane
  • B. hydrogen chloride
  • C. hydrogen
  • D. nitrogen
  • E. carbondioxide
View Answer & Discuss (4) JAMB 1981
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4
An example of a strong electrolyte is?
  • A. ethyl acetate
  • B. ethanol
  • C. glucose
  • D. sodium formate
  • E. formic acid
View Answer & Discuss (7) JAMB 1981
5
The oxidation number of manganese in KMnO4 is?
  • A. +1
  • B. +3
  • C. +5
  • D. +7
  • E. +2
View Answer & Discuss (6) JAMB 1981
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