Multiple choice

Which of the following metals is extracted from sea water?

  1. Potassium

  2. Magnesium

  3. Aluminium

  4. Beryllium

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Magnesium is commercially extracted from seawater through the Dow process. Seawater contains magnesium salts (mainly magnesium chloride) which can be precipitated and processed to obtain magnesium metal. The other metals listed are not obtained from seawater.