Which of the following statements about anhydrous Aluminium chloride is correct ?

AlCl₃ forms fumes in moist air because of hydrolysis. Hydration energy of Al³⁺ is very high, therefore AlCl₃ can undergo hydrolysis.

AlCl₃ is electron-deficient, therefore exist as dimer (Al₂Cl₆) in both vapor phase and in non polar solvents such as benzene, aniline, and so on.

Formation of AlCl₃ from S₂Cl₂ is:

$4{\mathrm{Al}}_2{\mathrm{O}}_3+3{\mathrm{S}}_2{\mathrm{Cl}}_2+9{\mathrm{Cl}}_2\to 8{\mathrm{AlCl}}_3+6{\mathrm{SO}}_2$