Advertisements
Advertisements
प्रश्न
Dehydration of hydrates of halides of calcium, barium and strontium i.e., CaCl26H2O, BaCl2.2H2O, SrCl2.2H2O, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides?
पर्याय
Act as dehydrating agent.
Can absorb moisture from air.
Tendency to form hydrate decreases from calcium to barium.
All of the above.
उत्तर
All of the above.
Explanation:
Chlorides of alkaline earth metals are hydrated salts. Due to their hygroscopic nature, they can be used as dehydrating agents to absorb moisture from air.
Extent of hydration decreases from Mg to Ba, i.e., MgCl2.6H2O, CaCl2.6H2O, BaCl2 2H2O, SrCl2.2H2O.
APPEARS IN
संबंधित प्रश्न
Describe two important uses of the following quicklime.
Describe the importance of the cement.
Dead burnt plaster is ______.
Suspension of slaked lime in water is known as ______.
Several sodium compounds find use in industries. Which of the following compounds are used for textile industry?
(i) Na2CO3
(ii) NaHCO3
(iii) NaOH
(iv) NaCl
Match the elements given in Column I with the properties mentioned in Column II.
| Column I | Column II |
| (i) Li | (a) Insoluble sulphate |
| (ii) Na | (b) Strongest monoacidic base |
| (iii) Ca | (c) Most negative EΘ value among alkali metals. |
| (iv) Ba | (d) Insoluble oxalate |
| (e) 6s2 outer electronic configuration |
Initial setting of cement is mainly due to ______.
In curing cement plasters, water is sprinkled from time to time. This helps in ______.
Which of the following on thermal decomposition yields a basic as well as acidic oxide?
The substance not likely to contain CaCO3 is ______.
