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| Q. |
Normal‖ rainfall is slightly acidic (and a pH of 5.6 has been assigned which might be somewhere near 5 ) because of the presence of _______? |
| A. | Nitric Oxide |
| B. | Sulphuric Acid |
| C. | Nitric Acid |
| D. | Carbonic Acid |
| Answer» D. Carbonic Acid | |
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