Advertisements
Advertisements
Question
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Advertisements
Solution
Air Pollution : Air is polluted by natural processes like volcanic eruption, crop pollination, etc. mostly it is polluted by human activities like burning of coal, wood, diesel oil, kerosene, petrol etc.
Fossil fuels contain sulphur and nitrogen as impurities. When fuels bum these substances combine with air to produce gasses like sulphur dioxide, nitrogen oxide and hydrogen sulphide. They cause many serious respiratory problems. They can destroy the ozone layer, which protects us from the ultra violet radiations of the Sun. They also cause acid rain, which damages crops and buildings.
APPEARS IN
RELATED QUESTIONS
Answer the question put against the following constituents of air :
Water vapours : Explain their role in modifying the earth’s climate.
Statement given below is incorrect. Write the correct statement :
Helium gas at low pressure is used for filling electric bulbs.
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
Fill in the blanks
Plants and animals maintain the balance of carbon ___________and _________ in the air.
Complete the statement given below by filling in the blank with the correct word from the words given:
The product formed which is common to both combustion and respiration is ______.
Why is air considered as a mixture?
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
Can you guess why fire extinguishers throw a stream of carbon-di-oxide while putting - off the fire?
Explain carbon dioxide and its uses.
How to show the presence of carbon-di-oxide in the air?
