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प्रश्न
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
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उत्तर
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.
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संबंधित प्रश्न
Statement given below is incorrect. Write the correct statement :
During thunder and lightning, nitrogen and oxygen combine to form nitrogen dioxide gas.
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
Name three different appliances where air is utilized.
What is the percentage of nitrogen in air?
Mention one necessary condition for the combustion to take place.
List out the uses of carbon dioxide.
______ present in the air is needed for respiration.
When air is moving with cool and soothing, it is called a cyclone.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Nitrogen
