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Wednesday, 01 April 2026
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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 21:
JAMB 2002
The furring of kettles is caused by the presence in the water of
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  • A Calcium tetraoxosulphate (VI)
  • B Calcium hydrogentrioxocarbonate (IV)
  • C Calcium hydroxide
  • D Calcium trioxocarbonate (IV)
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Question 22:
JAMB 2002
The property which makes alcohol soluble in water is the
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  • A Boiling point
  • B Hydrogen bonding
  • C Ionic character
  • D Covalent nature
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Question 23:
JAMB 2002
Steam changes the colour of anhydrous cobalt (II) chloride from
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  • A Blue to pink
  • B White to red
  • C White to green
  • D Blue to white
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Question 24:
JAMB 2002
The gas that gives brown colouration in brown ring test is
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  • A NO
  • B CO2
  • C NO2
  • D CO
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Question 25:
JAMB 2002
Ethanol can easily be produced by
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  • A Fermentation of starch
  • B Distillation of starch solution
  • C Catalytic oxidation of methane
  • D Destructive distillation of wood
View Answer & Explanation

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