Question 6
What method is used to extract highly reactive metals such as sodium and potassium?
The right answer is the one marked above.
Electrolysis. The molten chlorides of these metals are electrolysed and the metal is obtained.
Reduction is for the moderately reactive Fe, Sn, Zn and Pb. Physical methods are for the unreactive Ag, Au and Pt. The higher in the series, the more powerful the method needed.