Which of the following statements about polar stratosphere clouds (PSCs) is not correct?
Type I clouds are formed at about –77ºC and contain solid HNO3 . 3H2O
A tight whirlpool of wind called Polar Vortex is formed which surrounds Antarctica
PSCs do not react with chlorine nitrate and HCl
Type II clouds are formed at about –85ºC and contain some ice
