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JEE Main 20154 April
Exam
JEE Main
Year
2015
Date
4 April
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2015 · 4 April · Chemistry · General Principles and Processes of Isolation of Metals

In the context of the Hall-Heroult process for the extraction of Al...

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

Options

  1. ANa3AlF6N{a}_{3}Al{F}_{6} serves as the electrolyte.
  2. BCOCO and CO2C{O}_{2} are produced in this process.
  3. CAl2O3A{l}_{2}{O}_{3} is mixed with CaF2Ca{F}_{2} which lowers the melting point of the mixture and brings conductivity.
  4. DAl3+A{l}^{3 +} is reduced at the cathode to form AlAl.

Correct answer

A. Na3AlF6N{a}_{3}Al{F}_{6} serves as the electrolyte.

Step-by-step solution

Hall - Heroult process for extraction of Al. Al2O3 is electrolyte Na3AlF6 reduces the fusion temperature & provides good conductivity.
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