Aluminum is obtained by

Heating alumina with iron

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Heating alumina with coke

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Electrolysis of alumina solution in molten cryolite

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Electrolysis of fused aluminum chloride

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Electrolysis of alumina solution in molten cryolite
The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it. Aluminium oxide has a very high melting point (over 2000C) so it would be expensive to melt it. Aluminium oxide does not dissolve in water, but it does dissolve in molten cryolite.

Suggest Corrections

Similar questions

A l_{2} O_{3}

Explain the following reactions

(a)Silicon is heated with methyl chloride at high temperature in the presence of copper;

(b)Silicon dioxide is treated with hydrogen fluoride;

(d)Hydrated alumina is treated with aqueous NaOH solution.

(A l_{2} O_{3})

Join BYJU'S Learning Program