JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Electrolytic reduction of alumina to aluminium by the Hall-Héroult process is carried out

(A)In the presence of NaCl
(B)In the presence of fluoride (alone)
(C)In the presence of cryolite, which forms a low-melting molten mixture with aluminaCorrect
(D)Without any flux

Answer: (C)

Solution

Cryolite () is mixed with alumina to form a molten mixture with a much lower melting

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

Question ID VK-143929