Advertisements
Advertisements
Question
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?
Options
Act as dehydrating agent.
Can absorb moisture from air.
Tendency to form hydrate decreases from calcium to barium.
All of the above.
Solution
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
RELATED QUESTIONS
Describe two important uses of the following quicklime.
Describe the importance of the limestone.
Describe the importance of the cement.
Describe the importance of the plaster of paris.
Which of the following statements is true about Ca(OH)2?
When water is added to compound (A) of calcium, solution of compound (B) is formed. When carbon dioxide is passed into the solution, it turns milky due to the formation of compound (C). If excess of carbon dioxide is passed into the solution milkiness disappears due to the formation of compound (D). Identify the compounds A, B, C and D. Explain why the milkiness disappears in the last step.
A substance absorbs \[\ce{CO2}\] and violently reacts with water. That substance is ______.
Initial setting of cement is mainly due to ______.
\[\ce{Y <-[\Delta, 205°C] CaSO4.2H2O ->[\Delta, 120°C] X}\]
X and Y are respectively:
The commercial name for calcium oxide is ______.
