Post-UTME Chemistry 2016 Objective — Question 19
Question 19 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2016 Objective paper, with the correct answer and a full explanation.
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In the extraction of aluminium from bauxite, molten cryolite is added to
- A. increase the yield of Al
- B. dissolve the ore
- C. lower the melting point of Al2O3Correct
- D. purify the ore
Explanation
Cryolite is added to lower the melting point of alumina (Al2O3), reducing the energy needed for electrolysis.
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