Question

In electrometallurgy of aluminium, what will happen if graphite rods are not used as anode and are replaced by some other metal?

• A. $\mathrm { O } _ { 2 }$liberated at anode will react with aluminium to give back $\mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$
• B. will be liberated at anode instead of $\mathrm { O } _ { 2 }$
• C. The process of electrometallurgy will become non- spontaneous
• D. Aluminium oxide splits into $\mathrm { Al } ^ { 3 + }$ and $\mathrm { O } ^ { 2 - }$ ions only in presence of graphite

Answer 1

Answer: (A)

$\mathrm { O } _ { 2 }$liberated at anode will react with aluminium to give back $\mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$

Answer 2

If some other metal is used as the anode other than graphite then the oxygen liberated at anode will convert some Al to $\mathrm { Al } _ { 2 } \mathrm { O } _ { 3 }$