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Chemistry Past Questions and Answers

Jamb Chemistry Questions

Question 31:
A metal is extracted from its ore by the electrolysis of its molten chloride and it displaces lead from lead (ll) trioxonitrate (V) solution. The metal is
  • A Copper
  • B Aluminium
  • C Zinc
  • D Sodium
View Answer & Explanation
Question 32:
A metal is extracted from its ore by the electrolysis of its molten chloride and it displaces lead from lead (ll) trioxonitrate (V) solution. The metal is
  • A Copper
  • B Aluminium
  • C Zinc
  • D Sodium
View Answer & Explanation
Question 33:
Mortar is NOT used for under-water construction because
  • A It hardens by lose of water
  • B Its hardening doe not depend upon evaporation
  • C It requires concrete to harden
  • D It will be washed away by the flow of water
View Answer & Explanation
Question 34:
Which of the following is NOT involved in the extraction of metals from their ores?
  • A Reduction with carbon
  • B Reduction with other metals
  • C Reduction by electrolysis
  • D Oxidation with oxidizing agents
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Question 35:
When excess chlorine is mixed with ethene at room temperature, the product is
  • A 1,2 - dichloroethane
  • B 1,2 - dichloroethene
  • C 1,1 - dichloroethane
  • D 1, 1 - dichloroethene
View Answer & Explanation