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How do special polar stratospheric clouds contribute to ozone depletion?

Options

  1. AThey release oxygen radicals.
  2. BThey release nitrogen dioxide.
  3. CThey provide a surface for chlorine nitrate hydrolysis.
  4. DThey block UV radiation.

Correct answer

C. They provide a surface for chlorine nitrate hydrolysis.

Step-by-step solution

Special polar stratospheric clouds provide a surface on which chlorine nitrate undergoes hydrolysis to form hypochlorous acid, which can then react with hydrogen chloride to give molecular chlorine, contributing to ozone depletion.

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