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Extraction of Aluminiunt can be understo...

Extraction of Aluminiunt can be understood by :

Electrolytic reduction of `Al_(2)O_(3) :`
`{:("Electrolyte",:(Al_(2)O_(3)+"Cryolite")),("Cathode",:"Graphite inside the Fe container"),("Anode",:"Graphite rods"):}`
Coke powder is spreaded over the molten electrolyte to

A

prevent the heat radiation lies from the surface

B

prevent the corrosion of graphite anode

C

prevent oxidation of molten aluminium by air

D

both (a) & (b)

Text Solution

Verified by Experts

The correct Answer is:
C
To prevent the oxidation of molten Al `b^(2)` air.
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