During electrolytic reduction of alumina, two auxiliary electrolytes X and Y are added to increase e

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General Principles and processes of Isolation of Elements

easy

During electrolytic reduction of alumina, two auxiliary electrolytes $X$ and $Y$ are added to increase the electrical conductance and lower the temperature of melt in order to making fused mixture very conducting. $X$ and $Y$ are

cryolite and flourspar

cryolite and alum

alum and flourspar

flourspar and bauxite

Solution

During electrolytic reduction of alumina, two electrolytes $CaF _2$ and cryolite are added.

Function of fluorspar: It reduces the melting point of mixture and improves the electrical conductivity of the melt as compared to molten $Al _2 O _3$.

Cryolite, $Na _3 AIF _6$ forms a melt with lower melting temperature.

Standard 12

Chemistry

Statement $I :$ Leaching of gold with cyanide ion in absence of air $/ O _{2}$ leads to cyano complex of $Au ( III )$.

Statement $II :$ Zinc is oxidized during the displacement reaction carried out for gold extraction.

In the light of the above statements, choose the correct answer from the options given below.

easy

(JEE MAIN-2022)

Difference in density is the basis of

easy

The process of the isolation of a metal by dissolving the ore in a suitable chemical reagent followed by precipitation of the metal by a more electropositive metal is called:

hard

In the context of the Hall – Heroult process for the extraction of $Al,$ which of the following statements is false ?

hard

(JEE MAIN-2015)

The anode mud in the electrolytic refining of silver contains

easy

During electrolytic reduction of alumina, two auxiliary electrolytes $X$ and $Y$ are added to increase the electrical conductance and lower the temperature of melt in order to making fused mixture very conducting. $X$ and $Y$ are

Solution

Similar Questions

Difference in density is the basis of

The process of the isolation of a metal by dissolving the ore in a suitable chemical reagent followed by precipitation of the metal by a more electropositive metal is called:

In the context of the Hall – Heroult process for the extraction of $Al,$ which of the following statements is false ?

The anode mud in the electrolytic refining of silver contains

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