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Wednesday, 20 May 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 531:
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?
  • A Mg<sup style='font-size: smaller;'>+</sup>
  • B K<sup style='font-size: smaller;'>+</sup>
  • C CO<sub style='font-size: smaller;'>2</sub><sup style='font-size: smaller;'>2-</sup>
  • D HCO<sub style='font-size: smaller;'>3</sub>
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Question 532:
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?
  • A S dissolves in the solution
  • B Crystals of R are precipitated
  • C There is no observable change
  • D R and S react to generate heat
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Question 533:
Which of the following dilute solutions has the lowest pH value?
  • A Calcium trioxocarbonate (IV)
  • B Sodium trioxocarbonate (IV)
  • C Hydrochloric acid
  • D Ethanoic acid
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Question 534:
Which of the following in aqueous solution is neutral to litmus?
  • A NH<sub style='font-size: smaller;'>4</sub>CI
  • B NaCO<sub style='font-size: smaller;'>3</sub>
  • C FeCl<sub style='font-size: smaller;'>3</sub>
  • D NaCl
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Question 535:
What volume of a 0.1 M H<sub style='font-size: smaller;'>3</sub>PO<sub style='font-size: smaller;'>4</sub> will be required to neutralize 45.0 cm<sup style='font-size: smaller;'>3</sup> of a 0.2 M NaOH?
  • A 10.0 cm<sup style='font-size: smaller;'>3</sup>
  • B 20.0 cm<sup style='font-size: smaller;'>3</sup>
  • C 27.0 cm<sup style='font-size: smaller;'>3</sup>
  • D 30.0 cm<sup style='font-size: smaller;'>3</sup>
View Answer & Explanation