JAMB Chemistry 2019 Objective — Question 27
Question 27 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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In which of the following pairs of metals are the two members extracted by electrolysis?
- A. Copper and Zinc
- B. Lead and Calcium
- C. Magnesium and Zinc
- D. Magnesium and CalciumCorrect
Explanation
Metals extracted electrolytically are the highly reactive metals that cannot be extracted by chemical reduction: K, Na, Ca, Mg and Al. Magnesium and Calcium are both extracted electrolytically. (Copper is not extracted by electrolysis, though it is purified electrolytically.)
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