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| Q. |
Sea water can be purified by the process of – |
| A. | distillation |
| B. | evaporation |
| C. | filtration |
| D. | fractional distillation |
| Answer» A. distillation | |
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Explanation: The traditional process used in desalination operations is vacuum distillation— essentially the boiling of water at less than atmospheric pressure and thus a much lower temperature than normal. This is because the boiling of a liquid occurs when the vapor pressure equals the ambient pressure and vapor pressure increases with temperature. |
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