Multiple choice

Which of the following statements about polar stratospheric clouds (PSCs) is/are false?

  1. Type I clouds are formed at about -77˚C and contain solid HNO3.3H2O.

  2. PSCs do not react with chlorine nitrate and HCl.

  3. A tight whirlpool of wind called polar vortex is formed which surrounds Antarctica.

  4. Type II clouds are formed at about -85˚C and contain some ice.

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This statement is correct because type I clouds are those which are formed at about -77˚C and contain solid HNO3.3H2O. Thus this option is wrong.

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