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Question
Distinguish between drying and dehydrating agent.
Solution
| Drying agent | Dehydrating agent | |
| 1. | They remove moisture from other substances. | They remove chemically combined elements of water in the ratio of 2:1 from a compound. |
| 2. | They are used to dry gases like chlorine and sulphur dioxide and in desiccators to keep substances dry. | They prepare substances like carbon monoxide, sugar charcoal etc. |
| 3. | They represent physical change. | They represent chemical change. |
| 4. | Examples: Fused calcium chloride CaCl2, Phosphorus pentoxide P2O5. | Examples: Cone. sulphuric acid H2SO4. |
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