Which of the following are responsible for the formation of photochemical smog ?
1. Light intensity
2. Ratio of hydrocarbons to nitric oxide
3. CO2
4. Hydrocarbon reactivity
5. SO2
(a) 1, 2, 3, 4 and 5 (b) 1, 2 and 4 only (c) 2, 3 and 4 only (d) 2, 3 and 5 only
1. Light intensity
2. Ratio of hydrocarbons to nitric oxide
3. CO2
4. Hydrocarbon reactivity
5. SO2
(a) 1, 2, 3, 4 and 5 (b) 1, 2 and 4 only (c) 2, 3 and 4 only (d) 2, 3 and 5 only