9. What is the method for extracting sodium from halide ores like sodium chloride (NaCl)? a) Pyro metallurgy b) Hydrometallurgy c) Electro metallurgy d) Magnetic separation
Answer: c Explanation: Sodium is a highly electropositive metal that can be extracted readily from sodium chloride using an electro metallurgy or electrolysis technique. Metals such as copper, iron, and silver are extracted using pyrometallurgy and hydrometallurgy.
