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2116

Which of the following occurs when a solution of CuSO4 is electrolysed using copper electrodes?

  • A. The cathode becomes coated with copper
  • B. Both electrodes gain electrons
  • C. The blue colour of the solution fades gradually
  • D. The anode increases in mass
View Answer & Discuss (7) WAEC 2000
2117

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
2118

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
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2119

C8H18 will undergo the following reactions except

  • A. cracking
  • B. combustion
  • C. substitution
  • D. addition
View Answer & Discuss (1) WAEC 2000
2120

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
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