Question

Metal extracted from seawater
A) Potassium
B) Calcium
C) Magnesium
D) Sodium

Answer 1

answer is (C)

Because..Each cubic kilometre of seawater contains more than a million tons ofmagnesium compounds. In the US, 63% of magnesium production came from seawater and brines during 2015. The metal is extracted from seawater andbrines by means of electrolysis, a process that requires the passing of a current through a molten salt.