Question

The redox reaction, which takes place in extraction of magnesium, occurs:

• A. in the electrolytic cell, when fused $MgC{l}_2$ is subjected to electrolysis
• B. when fused $MgC{l}_2$ is heated
• C. when fused $MgC{O}_3$ is strongly heated
• D. None of the above

Answer 1

The correct option is A in the electrolytic cell, when fused $MgC{l}_2$ is subjected to electrolysis

In the electrolytic cell when fused $MgC{l}_2$ is subjected to electrolysis and $M{g}^{+2}$ gets reduced to Mg at cathode and $C{l}^{-}$ gets oxidised to $C{l}_2$ in anode. So, this is a redox reaction -

$MgC{l}_{2\left(fused\right)}⟶M{g}_{\left(s\right)}+C{l}_{2\left(g\right)}$