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Thursday, 06 August 2026
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Chemistry Past Questions and Answers

Post Utme Chemistry Questions

Question 291:
In the equilibrium reaction:<br/>2CO(g) + O₂(g) ⇌ 2CO₂(g)<br/>Increasing oxygen concentration causes equilibrium to:
  • A Shift toward carbon dioxide
  • B Stop reacting completely
  • C Lose gaseous molecules
  • D Shift toward carbon monoxide
View Answer & Explanation
Question 292:
Distilled water is usually:
  • A Rich in dissolved minerals
  • B Permanently hard chemically
  • C Highly alkaline naturally
  • D Nearly free from impurities
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Question 293:
The gas occupying the highest percentage of atmospheric air is:
  • A Carbon dioxide gas
  • B Nitrogen atmospheric gas
  • C Water vapour gas
  • D Oxygen atmospheric gas
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Question 294:
In the equilibrium reaction:<br/>CH₄(g) + H₂O(g) ⇌ CO(g) + 3H₂(g)<br/>Increasing pressure favours formation of:
  • A Methane reactant side
  • B Hydrogen gaseous side
  • C Carbon monoxide product
  • D Catalyst decomposition products
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Question 295:
The molar mass of H₂SO₄ is:
  • A 64 gmol⁻¹ value
  • B 98 gmol⁻¹ value
  • C 32 gmol⁻¹ value
  • D 44 gmol⁻¹ value
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