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Wednesday, 20 May 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 511:
Local black soap is made by boiling palm oil with liquid extract of ash. The function of the ash is to provide the?
  • A Acid
  • B Ester of allanoic acid
  • C Alkali
  • D Alkanol
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Question 512:
Synthetic rubber is made by polymerization of?
  • A 2 methyl buta - 1, 3 - diene
  • B 2 methyl buta - 1, 2 - diene
  • C 2 methyl but -1-ene
  • D 2 methyl but-2-ene
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Question 513:
Complete oxidation of propan -1- ol gives?
  • A Propanal
  • B Propan-2-al
  • C Propan-1-one
  • D Propanoic acid
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Question 514:
When water drops are added to calcium carbide in a container and the gas is passed through a jet and lifted, the resultant flame is called an?
  • A Oxyethylene flame
  • B Oxyhydrocarbon flame
  • C Oxyacetylene flame
  • D Oxymethane flame
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Question 515:
The greater the different in electronegativity between bonded atoms, the?
  • A Lower the polarity of the bond
  • B Higher the polarity of the bond
  • C Weaker the bond
  • D Higher the possibility of the substance formed being a molecule
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