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Question
Give two examples of Crystalline anhydrous substances.
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Solution
Common salt (NaCl), potassium nitrate (KNO3), sugar (C12H22O111), etc.
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Water molecules in loose chemical combination with other substances.
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Common Name |
Chemical Name |
Formula |
Acid, base or salt |
Efflorescent, hygroscopic or deliquescent substance |
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State the methods by which hydrated salts can be made anhydrous.
What are hydrous substances? Explain with examples.
The process of separation or deposition of crystals from a hot saturated solution on gentle cooling of the solution is called ‘crystallization’. With reference to the statement explain what is meant by ‘water of crystallization. State which physical properties of a crystal are correlated with the water of crystallization.
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Select the correct answer from the choice given in the options.
An anhydrous crystal _____.
Match the following
| 1. | Blue vitriol | CaSO4.2H2O |
| 2. | Gypsum | CaO |
| 3. | Deliquescence | CuSO4.5H2O |
| 4. | Hygroscopic | NaOH |
