Which of the following statements aluminium chloride is correct

A
It exists as AICI₃ molecules
B
It is not easily hydrolysed
C
It sublimes at 100°C under vacuum
D
It is a strong Lewis base

Solution:

AICl₃ exists as a dimer (AI₂Cl₆). It is a strong Lewis acid as Al has an incomplete octet and has a tendency to gain electrons. AICI₃ undergoes hydrolysis because of high hydration energy of Al³⁺.

${AlCl}_{3} + 3 H_{2} O \to Al (OH)_{3} + 3 HCl$

Option (c) is true that AICI₃ sublimes at 100°C under vacuum because of having weaker intermolecular forces.

Solution:

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