Question

In Hall - Heroult process, the following is used for reducing Al₂O₃ :-

• A. Na₃AlF₆
• B. Graphite
• C. Magnesium
• D. CaF₂

Hint:

The Hall-H´eroult process is a widely used method for extracting aluminum from its oxide. Graphite not only provides a surface for the reaction but also helps reduce \(Al_2O_3\)

Answer 1

The Correct Option is B

In the Hall-H´eroult process, aluminum oxide \((Al_2O_3)\) is electrolyzed to produce aluminum. Graphite serves as the anode material, where oxygen gas is released, while the cathode is where aluminum is deposited. Graphite also acts as a reducing agent in the process by reacting with oxygen. Thus, the correct answer is option (2) .