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Chemistry 2000 WAEC Past Questions

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31
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 & Discuss (1) WAEC 2000
32
C8H18 will undergo the following reactions except
  • A. cracking
  • B. combustion
  • C. substitution
  • D. addition
View Answer & Discuss (1) WAEC 2000
33
Which of the following is correct about both compounds show below? CH3CH 2CH2OH;CH 3
CH 2CH(OH)CH3
  • 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
View Answer & Discuss (2) WAEC 2000
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34
Which of the following needs to be hydrolysed before it shows reducing property?
  • A. Glucose
  • B. Maltose
  • C. Sucrose
  • D. Fructose
View Answer & Discuss (3) WAEC 2000
35
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 & Discuss WAEC 2000
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