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Wednesday, 05 August 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 231:
Fats and oils are?
  • A Addition products of long chain fatty acids and alkali
  • B Addition products of long-chain fattyy acids and glycerol
  • C Condensation products of long-chain fatty acids and glycerol
  • D Condensation products of formaldehyde and glycerol
  • E Liquids at 20°C
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Question 232:
Which of the following statements about phosphorus is NOT correct?
  • A Phosphorus is a solid mineral
  • B Phosphorus is obtained by oxidation reaction of phosphate
  • C Phosphorus exists in two allotropic forms
  • D Both forms of phosphorus are interconvertible
  • E Yellow phosporus ignites when rubbed on a rough surface
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Question 233:
28.8 cm<sup style='font-size: smaller;'>3</sup> of nitrogen at 15°C is cooled to O°C at constant pressure, the new volume of nitrogen is?
  • A 17.4 cm<sup style='font-size: smaller;'>3</sup>
  • B 14.7 cm<sup style='font-size: smaller;'>3</sup>
  • C 27.3 cm<sup style='font-size: smaller;'>3</sup>
  • D 31.7 cm<sup style='font-size: smaller;'>3</sup>
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Question 234:
If 48,000 coulombs of electricity are required to discharge 0.5 mole of sodium from a molten sodium chloride mass, then the number of coulombs required to discharge 2 moles of lead from molten lead (ll) chloride is?
  • A 48,000
  • B 96,000
  • C 192,000
  • D 384,000
  • E 576,000
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Question 235:
The following compounds are given with their corresponding boiling points.<br/>Compound Boiling Point <br/>i.................................14°C <br/>ii................................24°C <br/>iii................................0°C <br/>iv................................120°C <br/>V.................................-2°C <br/>From the above information, indicate which of the following is correct?
  • A All the compounds are gaseous at 20 °C
  • B One of the compounds is gaseous at 20 °C
  • C Two of the compounds are gaseous at 20 °C
  • D Three of the compounds are gaseous at 20 °C
  • E None of the compounds is gaseous at 20 °C
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