MCQOPTIONS
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| 1. |
Neutral water with pH about 7 becomes slightly acidic when aerated. This is because [NDA] |
| A. | oxygen from air is dissolved in the water which makes the water acidic |
| B. | dirt, which get contaminated with the water during aeration makes the water acidic |
| C. | ultraviolet radiation dissociates water molecules and makes water acidic |
| D. | carbon-dioxide from air is dissolved |
| Answer» E. | |