Aluminium is extracted from alumina ( Al _2 O _3) by electrolysis of a molten mixture of :

NEET 2012 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)NEET 2012

Not in JEE Main or NEET syllabus

Aluminium is extracted from alumina () by electrolysis of a molten mixture of :

(1)
(2)
(3)
(4)Correct

Answer: (4)

Solution

In the Hall-Heroult process, pure alumina (m.p. about 2323 K) is dissolved in molten cryolite, , with fluorspar, . Cryolite and fluorspar lower the melting point of the mixture (to about 1140 K) and increase its electrical

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-091130