JEE Main 2015 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Main 2015

Not in JEE Main or NEET syllabus

In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?

(1) serves as the electrolyte.Correct
(2)CO and are produced in this process.
(3) is mixed with which lowers the melting point of the mixture and brings conductivity.
(4) is reduced at the cathode to form Al.

Answer: (1)

Solution

Cryolite is the molten solvent in which the alumina dissolves; it is the dissolved that is electrolysed, so calling the electrolyte is false, option (1). The

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Question ID VK-115180