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प्रश्न
The pH of normal rain water is ______.
पर्याय
6.5
7.5
5.6
4.6
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उत्तर
The pH of normal rain water is 5.6.
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संबंधित प्रश्न
Haemoglobin of the blood forms carboxy haemoglobin with ______.
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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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- What is the danger associated with these gases?
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Differentiate the following:
BOD and COD
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