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प्रश्न
What are the causes of air pollution?
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उत्तर
- When fuels burn, they produce sulphur dioxide, sulphur trioxide, nitrogen dioxide, and hydrogen sulphide when these gases mix with rainwater.
- They produce sulphuric and nitric acid. These acids mix with rain water to form acid rain and also caused by the industries and automobiles.
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
The area where a lot of fuel burns has more percentage of carbon dioxide.
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
Tick (√) the most appropriate answer.
The humans pollute the air by :
Define the following:
Combustion.
Give a reason why nitrogen is filled in food packets and not oxygen.
Explain why mountaineers carry oxygen cylinders with them?
Nitrogen is about two times more soluble in water than oxygen.
The solid form of CO2 is called dry ice which undergoes condensation.
Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
Explain the following observations very briefly
Breathing through mouth may harm you.
