Question

Why graphite is used as an anode but not diamond?

Answer 1

Graphite anode is used because when carbon react with oxygen librated at anode it forms CO2 gas which is a exothermic reaction and maintain the temperature of process and not allow molten aluminum to solidify.

Answer 2

$\bf YOUR \: QUESTION$

Why graphite is used as an anode but not diamond?

$\bf \blue {REQUIRED \: ANSWER}$

➥ Graphite is used as an anode because it is a good conductor of electricity due to presence of free electrons.

➥No free electrons are present in Diamond so, it is an insulator. Diamond is not used as anode because it is a bad conductor of electricity.

Hope it's helpful for you. ✔️