Which of the following are used in aluminium extraction? Cryolite feldspar, carbon, ferrosilicon, iron, Nal, Calcium carbide, nitrogen gas, NaOH.

Answer

5

Explanation

In the extraction of .Al..
Cryolite used to decrease the M.pt. of `Al_(2)O_(3)` and increases it.s conductivity.
Gas carbon lined in side the iron tank acts as cathode. Anode is bunch of Carbon rods.
NaOH used as leaching agent.
In serpecks process `Al_(2)O_(3)` heated with coke at `1800^(@)C` in the presence of `N_(2)` gas
`Al_(2)O_(3)+3C+N_(3) to 2AIN+3CO`
`:. 5` components are used in Al extraction.