Electrolytic reduction of alumina to aluminiu | vedclass

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

Question

(C) The Hall-Heroult process involves the electrolytic reduction of alumina $(Al_2O_3)$.Pure alumina has a very high melting point and is a poor condu

Vedclass · Accepted Answer

Cryolite which forms a melt with lower melting temperature

Vedclass · Answer

(C) The Hall-Heroult process involves the electrolytic reduction of alumina $(Al_2O_3)$.Pure alumina has a very high melting point and is a poor conductor of electricity.To overcome this,alumina is dissolved in a fused mixture of cryolite $(Na_3AlF_6)$ and fluorspar $(CaF_2)$.This mixture serves two main purposes:$1$. It lowers the melting point of the mixture to approximately $1240 \ K$.$2$. It increases the electrical conductivity of the melt.Therefore,the correct option is $C$.

Electrolytic reduction of alumina to aluminium by the Hall-Heroult process is carried out in the presence of:

Similar Questions

In the Hall-Heroult process,which of the following is used for reducing $Al_2O_3$?

Although carbon and hydrogen are better reducing agents,they are not used to reduce metallic oxides at high temperatures. Why?

The Ellingham diagram represents a plot of:

The reaction for obtaining the metal $(M)$ from its oxide $(M_{2}O_{3})$ ore is given by
$M_{2}O_{3(s)} + 2 Al(\ell) \xrightarrow{\text{Heat}} Al_{2}O_{3}(\ell) + 2 M_{(s)}$,$(s = \text{solid}, \ell = \text{liquid})$
In this case,$M$ is

Which of the following chemical equations represents the hydrometallurgical process for the extraction of copper from its ore?

Vedclass Test Series

Exam Paper Generator

Online Exam Module