Magnesium is extracted electrolysing fused magnesium chloride containing `NaC1`and `CaC1_(2)`using:

Options

A. a nickel cathode and a graphite anode.
B. the iron container as anode and a nickel cathode.
C. the iron container as cathode and a graphite rod as anode.
D. the nickel container as cathode and iron as anode.

Answer

C

Explanation

`MgCl_(2)hArr Mg^(2+)+2Cl^(-)`
At cathode: `Mg^(2+) +2e^(-) rarr Mg(99%pure)`,
AT anode: `2CI^(-)rarr CI_(2)+2e^(-)`