Which one of the following metals is widely extracted by the electrolysis of its molten compound?

  1. A. Cu
  2. B. Au
  3. C. Sn
  4. D. Na

Correct Answer: D. Na

Explanation

Highly reactive metals like sodium (Na) are extracted by the electrolysis of their molten chlorides because they cannot be reduced by carbon or other standard reducing agents.

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