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

Options

A. It fumes in moist air.
B. lt exists as dimer both in the vapour state below `350^(@)C` and in non-polar solvents.
C. It is prepared by heating `Al_(2)O_(3)` in a stream of sulphur chloride `(S_(2)Cl_(2))` vapours and chlorine.
D. All of these

Answer

D

Explanation

(A) `AlCl_(3)+3H_(2)O rarr Al(OH)_(3)+3HCl uarr` (fumes)
(B) It exists as dimer in non-polar solvents like benzene and in vapour state below `400^(@)C`.
(C ) `4Al_(2)O_(3)+3S_(2)Cl_(2)+9Cl_(2) rarr 8AlCl_(3)+6SO_(2) uarr`
So all options are correct.