Question

Which one of the following processes does not yield anhydrous $AlC{l}_3$?

• A. Heating of $AlC{l}_3.6H_{2}O$.
• B. Passing dry HCl over heated aluminium powder.
• C. Passing dry $C{l}_2$ over heated aluminium powder.
• D. Heating a mixture of alumina and coke in a current of dry $C{l}_2$.

Answer 1

The correct option is A Heating of $AlC{l}_3.6H_{2}O$.

$2AlC{l}_3.6H_{2}O\stackrel{\Delta }{\to }A{l}_2{O}_3+6HCl+9H_{2}O$ .