Photochemical smog is formed from automobile exhaust
(A) By reaction of hydrocarbon & nitric oxide in presence of sunlight
(B) Appears only on sunny days
(C) Is harmful for crops and trees also besides causing eye irritation &
asthma
(D) All (A), (B) & (C)
(A) By reaction of hydrocarbon & nitric oxide in presence of sunlight
(B) Appears only on sunny days
(C) Is harmful for crops and trees also besides causing eye irritation &
asthma
(D) All (A), (B) & (C)