Saved Bookmarks
| 1. |
What is photochemical smog? What are its effects? How can it be controlled? |
|
Answer» Solution :It is a kind of smog formed in warm, dry and sunny climate. It is formed when sunlight is absorbed by `SO_(2)` oxides of nitrogen and hydrocarbons. It act as an oxidising agent Effects of photochemical smog (i) It produces irritation in eyes and also in RESPIRATORY system. (ii) It can damage many MATERIALS such as metals, stones, building materials etc. (iii) `NO_2` present in photochemical smog gives it brown colour which reduces the VISIBILITY. (iv) It is harmful to fabrics, CROPS and ornamental plants: Control of photochemical smog (i) By using catalytic converters in automobiles. (ii) By spraying certain compounds into the atmosphere which generate firee radicals that can easily combine with the free radicals that initiates the reaction forming toxic compounds of photochemical smog (iii) Certain plants such as Pinus, Juniparus, Pyrus could be also helptul in this matter |
|