JEE Main Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main

Not in JEE Main or NEET syllabus

Aluminium is extracted by the electrolysis of [Jamia Millia Islamia 2005]

(A)Alumina
(B)Bauxite
(C)Molten cryolite
(D)Alumina mixed with molten cryoliteCorrect

Answer: (D)

Solution

Pure alumina melts at a very high temperature, so in the Hall–Héroult process it is dissolved in molten cryolite (), which lowers the melting point and increases the melt's electrical conductivity, and this

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Question ID VK-138214