Carnallite on electrolysis gives

Options

A. Mg and `Cl_(2)`
B. Ca and `Cl_(2)`
C. K and `Cl_(2)`
D. Al and `Cl_(2)`

Answer

C

Explanation

Carnallite is an ore of potassium `KCl.MgCl_(2).6H_(2)O` . Electrolysis of fused KCl and `CaCl_(2)` is carried out to obtain potassium.
`KCl hArr K^(+) + Cl^(-)`
At cathode `: K^(+)+e^(-) to K`
At anode : `2Cl^(-) to Cl_(2) + 2e^(-)`