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प्रश्न
State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
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उत्तर
Anhydrous CaCl2 on exposure to atmosphere form solution.
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संबंधित प्रश्न
Identify the substance underlined, in the following case
A solid formed by reaction of two gases, one of which is acidic and the other basic in nature
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A salt X when dissolved in distilled water gives a clear solution which turns red litmus blue. Explain the phenomenon.
Write the name and formula of one salt which contains:
Two molecules of water of crystallisation.
The pH values of three solutions A, B and C are given in the table. Answer the folloiwng questions:
| Solution | pH value |
| A | 12 |
| B | 2 |
| C | 7 |
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Define the following term:
Efflorescence
Define the following term:
Hygroscopy
Taking sodium carbonate as an example, give the meaning of the following terms:
Water of crystallization
Name a colourless gas which bleaches.
Name gases which has a sour taste.
