Multiple choice

Highly reactive metals (like K, Na, Ca, Mg, Al) are extracted by the?

  1. Reducing by carbon

  2. Electrolysis of their molten chlorides or oxides

  3. Heating its sulphide ore in air

  4. a & b both
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Highly reactive metals have a strong affinity for oxygen and cannot be reduced by carbon; therefore, they are extracted by the electrolysis of their molten salts.

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