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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

NTA Abhyas 2020 · Chemistry · General Principles and Processes of Isolation of Metals

How many of the following species are related to Hall's process of...

How many of the following species are related to Hall's process of purification of bauxite?
White bauxite,

{\text{Na}}_{2}{\text{CO}}_{3}, {\text{CO}}_{2},

cryolite, red bauxite,

\text{NaOH}

Correct answer

3

Step-by-step solution

{\text{Na}}_{2}{\text{CO}}_{3}, {\text{CO}}_{2}

and red bauxite are related to Hall's process of purification of bauxite.

2A{l}_{2}{O}_{3} + 3C \to 4Al + 3C{O}_{2}

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