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Chemistry WAEC Past Questions

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1886

Dilute trioxonitrate (V) acid does not produce hydrogen when it reacts with metals because

  • A. it reacts with the product.
  • B. it is highly corrosive.
  • C. there is no visible reaction.
  • D. it is a strong oxidizing agent.
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1887

Which of the following statements is correct?

  • A. Addition reactions occur between alkanes and chlorine.
  • B. Butane has a lower boiling point than propane.
  • C. Pentane has five isomers.
  • D. An alkane with 49 carbon atoms contains 100 hydrogen atoms
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1888

A mixture containing two salts of different solubility can be separated by

  • A. chromatography.
  • B. crystallization.
  • C. distillation.
  • D. evaporation.
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1889

Species that occur in a reaction pathway but not in the overall reaction are known as

  • A. Reactants
  • B. Inhibitors
  • C. Products
  • D. Intermediates
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1890

How many moles are there in 3.0 g of \(O_2\)? [O = 16.0]

  • A. 0.0093 moles.
  • B. 0.0930 moles.
  • C. 0.0625 moles.
  • D. 0.6250 moles.
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