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Chemistry Past Questions

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26
An example of an alcohol is
  • A. CCl4
  • B. CH3COOH
  • C. CHCl3
  • D. C2H6
  • E. CH3OH
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27
The nucleus of an atom contains
  • A. protons only
  • B. neurons only
  • C. protons and electrons
  • D. neutrons and electrons
  • E. protons and neutrons
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28
Hypochlorous acid is used as a bleach because
  • A. it is a strong acid
  • B. it yields chlorine readily in pure water
  • C. it is an oxidising agent
  • D. it is a weak acid
  • E. it is a reducing agent
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29

The normal boiling point of a liquid is defined as

  • A. the temperature at which its vapour pressure equals the atmospheric pressure
  • B. the temperature at which bubbles begin to form
  • C. the temperature at which the vapour pressure equals 1 temperature
  • D. the temperature at which the rate of condensation of vapour equals the rate of vaporisation of the liquid
  • E. the temperature at which the space above the liquid is saturated
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30

Which of the following compounds will form a solution if exposed to air?

  • A. Na2CO3.10H2O
  • B. NaNO3
  • C. CuSO4
  • D. CaCl2
  • E. Na2SO4.10H2O
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