Aluminium is obtained by:

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Aluminium is obtained by the Hall-$H$éroult process,which involves the electrolysis of alumina $(Al_2O_3)$ dissolved in molten cryolite $(Na_3AlF_

Vedclass · Accepted Answer

Electrolysing $Al_2O_3$ dissolved in $Na_3AlF_6$

Vedclass · Answer

(B) Aluminium is obtained by the Hall-$H$éroult process,which involves the electrolysis of alumina $(Al_2O_3)$ dissolved in molten cryolite $(Na_3AlF_6)$.The cryolite lowers the melting point of the mixture and increases its electrical conductivity.The overall reaction is:$2Al_2O_3 + 3C \rightarrow 4Al + 3CO_2$At the cathode:$Al^{3+} + 3e^- \rightarrow Al$At the anode:$C(s) + O^{2-} \rightarrow CO + 2e^-$$C(s) + 2O^{2-} \rightarrow CO_2 + 4e^-$

Similar Questions

Thermite is a mixture of $X$ parts of ferric oxide and $Y$ parts of aluminium powder. $X, Y$ respectively are

Which metals are extracted using the self-reduction method?

Aluminum is obtained from alumina $(Al_2O_3)$ by the electrolysis of a molten mixture of:

In metallurgy,a flux is a substance that .....

In the extraction of copper,which reaction is responsible for the formation of metal during Bessemer conversion?

Vedclass Test Series

Exam Paper Generator

Online Exam Module