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प्रश्न
The pH of normal rain water is ______.
पर्याय
6.5
7.5
5.6
4.6
उत्तर
The pH of normal rain water is 5.6.
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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 ______.
Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using ______.
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 |
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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?
Define smog.
Explain how does greenhouse effect cause global warming.
What are particulate pollutants? Explain any three.
Differentiate the following:
BOD and COD
