Chemistry · Oct / Nov 2023 · Paper 11 · Question 29
Some metals and the compounds in their ores are shown. metal | Al | Ca | Pb | Na | Fe | Mg compound in ore | Al2O3 | CaCO3 | PbS | NaCl | Fe2O3 | MgCO3 Which type of reaction occurs in the extraction of each of these metals from its ore?
- Adecomposition by heat
- Belectrolysis
- Cprecipitation
- Dreduction
As printed in the paper
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Correct answer: D. reduction
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