Question

To extract potassium $K$ from Karnalite ($KCl.MgC{l}_2.6H_{2}O$), the reduction process used is ___.

• A. smelting
• B. electrolysis
• C. leaching
• D. pyro refining

Answer 1

The correct option is B

electrolysis

Metals like sodium - $Na$, potassium - $K$, and aluminium - $Al$ etc., are highly electropositive. In other words, the oxides of these metals are very stable and thus are difficult to reduce by carbon reduction (or any other methods). So, electrolysis is employed to extract such reactive metals from their corresponding ores.