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Chemistry WAEC Past Questions

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456

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 chromatogram of the colouring extract
  • D. .determine the molar mass of the colouring
View Answer & Discuss (6) WAEC 2000
457

2 moles of hydrogen gas will react completely with one mole of....

  • A. CH2=CHCl
  • B. CH3-CH=CH2
  • C. C6H5-CH3
  • D. CH≡C-CH2-CH3
View Answer & Discuss (3) WAEC 2000
458

C8H18 will undergo the following reactions except

  • A. cracking
  • B. combustion
  • C. substitution
  • D. addition
View Answer & Discuss (1) WAEC 2000
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459

Which of the following is correct about both compounds shown 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 (3) WAEC 2000
460

Which of the following needs to be hydrolyzed before it shows reducing property?

  • A. Glucose
  • B. Maltose
  • C. Sucrose
  • D. Fructose
View Answer & Discuss (4) WAEC 2000
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