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3 marksThe Atmosphere

CAPE Chemistry Unit 2 · 2007 · Paper 2 · Question 9(a)(ii)

Depletion and chemistry of stratospheric ozone.

Explain the biological significance of stratospheric ozone.

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Other parts of this question

  1. 9(a)(i)Write equations showing the formation of stratospheric ozone and how ozone levels are maintained naturally in the stratosphere.[6 marks]
  2. 9(b)Give FOUR reasons why ozone is considered a pollutant in the troposphere (lower atmosphere).[4 marks]
  3. 9(c)(i)State THREE properties that made CFCs suitable for use as aerosol propellants.[3 marks]
  4. 9(c)(ii)State TWO other uses of CFCs or Freons.[2 marks]
  5. 9(d)Give TWO reasons why CFCs are so destructive to the stratospheric ozone layer.[2 marks]

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