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Thursday, 11 June 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 2626:
Which of the following procedures is suitable for identifying the food colouring added to a pastry sample?
  • A Carry out some food tests
  • B Examine the pastry sample under a microscope
  • C Do a chromotogram of the colouring extract
  • D Determine the molar mass of the colouring
View Answer & Explanation
Question 2627:
C<sub style='font-size: smaller;'>8</sub>H<sub style='font-size: smaller;'>18</sub> will undergo the following reactions except
  • A Cracking
  • B Combustion
  • C Substitution
  • D Addition
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Question 2628:
Which of the following is correct about both compounds show below? CH<sub style='font-size: smaller;'>3</sub>CH <sub style='font-size: smaller;'>2</sub>CH<sub style='font-size: smaller;'>2</sub>OH;CH <sub style='font-size: smaller;'>3</sub><br/>CH <sub style='font-size: smaller;'>2</sub>CH(OH)CH<sub style='font-size: smaller;'>3</sub>
  • A They have identical physical properties
  • B They are structural isomers
  • C Their general molecular formula is the same
  • D They are oxidized to alkanones
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Question 2629:
Which of the following needs to be hydrolysed before it shows reducing property?
  • A Glucose
  • B Maltose
  • C Sucrose
  • D Fructose
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Question 2630:
Two-organic substances are labelled K and L if K gave a blue-black colour with iodine solution and L gave a deep red precipitate with Million's reagent, it can be concluded that
  • A K is a carbhydrate and L is a protein
  • B K is alkaline and L is acidic
  • C K is unsaturated and L is a reducing sugar
  • D K is a reducing agent and L is an amino acid
View Answer & Explanation