Embibe Experts Solutions for Chapter: General Principles and Processes of Isolation of Metals (Metallurgy), Exercise 2: Level 2

Baeyer's process is used for the purification of bauxite containing ______ as the chief impurity.

Alumino thermite process is used for the extraction of metals, whose oxides are _____.

For the extraction of chromium from ${\mathrm{Cr}}_2{\mathrm{O}}_3,$ the process adopted is ____ process.

Which of the following is NOT an ore?

How is ore of aluminium concentrated?

In order to refine "blister copper" it is melted in a furnace and stirred with green logs of wood. The purpose is ____.

Match items of Column $\mathrm{I}$ with the items of Column $\mathrm{II}$ and assign the correct code:

In the extraction of silver from the argentite ore, the ore is treated with a dilute solution of $\mathrm{NaCN}$ in water, in the presence of $\mathrm{Y}$. Whereby the following reaction takes place:
${\mathrm{Ag}}_2\mathrm{X}+4\mathrm{NaCN}+2\mathrm{Y}\to 2\mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN}{)}_2\right]+{\mathrm{Na}}_2{\mathrm{XO}}_4$. $\mathrm{X}$ and $\mathrm{Y}$ in this reaction are