CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

In the commercial electrochemical process for aluminium extraction, the electrolyte used is :

A
Al(OH)3 in NaOH solution
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
an aqueous solution of Al2(SO4)3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
a molten mixture of Al2O3 and Na3AlF6
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
a molten mixture of AlO(OH) and Al(OH)3
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C a molten mixture of Al2O3 and Na3AlF6
The electrolysis of pure alumina faces some difficulties. Pure alumina is a bad conductor of electricity. The fusion temperature of pure alumina is about 2000C and at this temperature when electrolysis is carried out on the fused mass, the metal formed vaporizes, as the boiling point of aluminium is 1800C. These difficulties are overcome by using a mixture containing alumina (Al2O3), cryolite (Na3AlF6), and fluorspar (CaF2).

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Metallurgy of Aluminium
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon