100 Best Geography- Environment MCQs
Q41). The chief source of Hydrocarbons in the air are
a).Industries
b).Motor vehicles
c).Fertilizer units
d).All of these
Correct Answer:
All of these
Explaination:
Q42). Which one of the following is not required for the formation of photochemical smog ?
a).Oxygen
b).Oxide of Nitrogen
c).Carbon Monoxide
d).Sunlight
Correct Answer:
Oxide of Nitrogen
Explaination: