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AIIMS2006BotanyEcosystem

Assertion : UV radiation causes photodissociation of ozone into O ₂ and O , thus causing damage to the stratospheric ozone layer. Reason : Ozone hole is resulting in global warming and climate change.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of the assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of the assertion
  3. CIf assertion is true, but reason is false
  4. DBoth assertion and reason are false statements.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of the assertion

Step-by-step solution

Stratosphere zone of earth's atmosphere contains a layer of ozone ( O ₃ ) which prevents the earth surface from about 99 % of incoming solar ultra violet radiations. The primary chemicals responsible for ozone depletion are a group of chlorine containing compounds called chloroflourocarbons (CFCs) used as coolants in refrigerators and air conditioners and propellants for aerosol cans and foam blowing agents for insulation and packaging and also as solvents. After their release into troposphere CFCs go to stratosphe

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