Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Purification of aluminium, by electrolytic refining, is known as
Text Solution
Verified by ExpertsThe correct answer is:
A
: Aluminium metal obtained from Hoope’s electrolytic refining process is about 99.9% pure. The cell used for this process consists of three layers. The upper layer is pure 
, acts as cathode, the middle layer is mixture of fluorides of Al and Ba, which acts as electrolyte. The lowest layer is impure ‘Al’, which acts as anode. On electrolysis Pure ‘Al’ is transferred from the bottom to the top layer, through the middle layer.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Considering Ellingham diagram, which of the following metals can be used to reduce alumina?
Extraction of gold and silver involves leaching with ion. Silver is later recovered by
Match items of Column I with the items of Column II and assign the correct code :
Column I Column II
In the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction o…
“Metals are usually not found as nitrates in their ores.” Out of the following two (I and II) reaso…
Roasting of sulphides gives the gas as a byproduct. This is a colourless gas with choking smell of…