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प्रश्न
How is acid rain formed?
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उत्तर
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Rainwater has a pli of 5.6 due to the dissolution of CO., into it. Oxides of sulphur and nitrogen in the atmosphere may be absorbed by droplets of water that make up the clouds and get chemically converted into sulphuric acid and nitric acid. Due to this, the pH of rainwater drops below the level of 5.6. Hence it is called acid rain.
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Acid rain is a by-product of sulphur and Nitrogen oxides in the atmosphere. Burning of fossil fuels in power stations, furnaces and petrol, diesel in motor engines produce SO2 and NO2 gases. They are converted into H2SO4 and HNO3 by the reaction with oxygen and water.
- \[\ce{2SO2 + O3 + 2H2O → 2H2SO4}\]
\[\ce{4NO2 + O2+ 2H2O → 4HNO3}\]
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संबंधित प्रश्न
Haemoglobin of the blood forms carboxy haemoglobin with ______.
Photo chemical smog formed in congested metropolitan cities mainly consists of ______.
The pH of normal rain water is ______.
Living in the atmosphere of CO is dangerous because it ______.
Match the List I with List II and select the correct answer using the code given below the lists.
| List I | List II | ||
| A | Depletion of ozone layer |
1 | CO2 |
| B | Acid rain | 2 | NO |
| C | Photochemical smog | 3 | SO2 |
| D | Green house effect | 4 | CFC |
Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted.
Reason(R): High biological oxygen demand means high activity of bacteria in water.
What would happen, if the greenhouse gases were totally missing in the earth’s atmosphere?
Ethane bums completely in air to give CO2. while in a limited supply of air gives CO. The same gases are found in automobile exhaust. Both CO and CO2 are atmospheric pollutants
- What is the danger associated with these gases?
- How do the pollutants affect the human body?
Explain the effects of acid rain.
Differentiate the following:
BOD and COD
