JEE Main Chemistry question

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

Not in JEE Main or NEET syllabus

Purification of alumina is essential because:

(A)Impure alumina is a very poor conductor of electricity
(B)Impure alumina has a very high melting point
(C)Impure alumina cannot react with the oxidizing agent
(D)It is difficult to purify aluminium metalCorrect

Answer: (D)

Solution

If impurities (such as , ) were left in the alumina fed to the electrolytic (Hall–Héroult) cell, they would be reduced along with aluminium and end up alloyed in the liquid metal; separating

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-138521