`Al_(2)O_(3)` can be converted to anhydrous `AlCl_(3)` by heating :

Options

A. A mixture of `Al_(2)O_(3)` and carbon in dry `Cl_(2)` gas
B. `Al_(2)O_(3)` with `Cl_(2)` gas
C. `Al_(2)O_(3)` with HCl gas
D. `Al_(2)O_(3)` with NaCl in solid state

Answer

A

Explanation

`Al_(2)O_(3)` may be converted to anhydrous `AlCl_(3)` by heating of mixture of `Al_(2)O_(3)` and carbon in dry chlorine.
`Al_(2)O_(3) + 3C + underset("Hot and dry")(3Cl_(2)) rarr underset(("Anhydrous" AlCl_(3)))(Al_(2)Cl_(6))`