Which of the following statements about anhydrous aluminium chloride is correct?
Correct answer: B. It is not easily hydrolysed
- A. It exists as AlCl2 molecule
- B. It is not easily hydrolysed
- C. It sublimes at 100oC under vacuum
- D. It is a strong Lewis base
Explanation
Anhydrous aluminum chloride does not readily react with water to undergo hydrolysis. Instead, it is highly hygroscopic, meaning it absorbs moisture from the air, and can react with water molecules present in the environment to form hydrated aluminum chloride compounds. However, the anhydrous form itself does not readily hydrolyze. Therefore, option b is correct. Option A is incorrect as the formula for anhydrous aluminum chloride is AlCl3. Option C is incorrect because anhydrous aluminum chloride does not sublime at 100°C under vacuum. Option D is incorrect because anhydrous aluminum chloride is a strong Lewis acid, not a strong Lewis base.
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The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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