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प्रश्न
Match the following
| 1. | Blue vitriol | CaSO4.2H2O |
| 2. | Gypsum | CaO |
| 3. | Deliquescence | CuSO4.5H2O |
| 4. | Hygroscopic | NaOH |
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उत्तर
| 1. | Blue vitriol | CuSO4.5H2O |
| 2. | Gypsum | CaSO4.2H2O |
| 3. | Deliquescence | NaOH |
| 4. | Hygroscopic | CaO |
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संबंधित प्रश्न
Give one word for the following statement:
A substance which does not contain water .
Give the names and formulae of two substances.
Hydrated substance
What are drying or desiccating agents? Give examples.
Name three methods by which hydrous substances can be made anhydrous.
Differentiate between ‘hydrated’ & ‘anhydrous’ crystals. Give the chemical formula of – the following hydrated crystals -
(a) Washing soda
(b) Gypsum
(c) Blue vitriol
(d) Epsom salt
(e) Glauber’s salt.
State which crystal from (a) to (e) is a pentahydrate.
Differentiate the function of concentrated sulphuric acid as a drying agent & as a dehydrating agent. Is fused calcium chloride a dehydrating or a desiccating agent. Give reasons.
Explain the following observation:
In the expression anhydrous copper sulphate, what is meant by “anhydrous”?
Select the correct word from the words in option to complete the sentence:
Efflorescence occurs when the vapour pressure of the hydrated crystals is ____ than the vapour pressure of the atmospheric humidity.
Name or state the following:
A liquid hydroscopic substance.
A hot saturated solution of copper sulphate forms crystals as it cools. Why?
