A) It is reducing in nature.
B) It is formed in winter.
C) It is a sulphurous smog.
D) Components of the smog, NO and \[{{O}_{3}}\], irritate the nose and throat and their high concentration causes headache, chest pain, dryness of the throat, cough and difficulty in breathing.
Correct Answer: D
Solution :
[d] Photochemical smog occurs in warm, dry and sunny climate. It has high concentration of NO, \[N{{O}_{2}}\] and \[{{O}_{3}}\]. Their low concentration causes irritation in nose and throat and their high concentration causes headache, chest pain, cough and difficulty in breathing.
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