Which is not the constituents of photo chemical smog?
A. RCHO
B. RCOR
C. PAN
D. CF2Cl2
Answer: Option D
A. RCHO
B. RCOR
C. PAN
D. CF2Cl2
Answer: Option D
The term 'brown air' is used for
A. Acid fumes
B. Photochemical smog
C. Sulphurous smog
D. Industrial smog
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