JEE Main 2012 — General Principles and Processes of Isolation of Metals Question with Solution
JEE Main 2012 (12 May Online)
Question
In the electrolysis of alumina to obtain aluminium metal, cryolite is added mainly to
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Show full solutionCorrect option: A
Correct answer
Alower the melting point of alumina
Step-by-step explanation
Fused alumina is a bad conductor of electricity. Therefore, cryolite and fluorspar are added to purified alumina which not only make alumina a good conductor of electricity but also reduce the melting point of the mixture to around .
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This is a previous-year question from JEE Main 2012, covering the General Principles and Processes of Isolation of Metals chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.