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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?
विकल्प
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.
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