First slide

Diborane

Question

Alumina may be converted into anhydrous aluminium chloride by

Moderate

A

heating it with conc.HCl
B

heating in a current of dry chlorine
C

heating it with rock salt
D

mixing it with carbon and heating the mixture in a current of dry chlorine

Solution

$\large \mathop {2A{l_2}{O_3}}\limits_{Alu\min a} + 3{C_{(s)}} \to 4A{l_{\left( s \right)}} + 3C{O_2} \uparrow$
$\large 2Al + \mathop {3C{l_2}}\limits_{dry} \xrightarrow{\Delta }2AlC{l_3}$

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