Refining or Purification of Impure Metals

Describe the process involved in the electrolytic refining of metals.

How does the Bessemerisation process carried out?

Which of the following is/are correct chemical equations involved in Van-Arkel method:

Zirconium is refined by _____ method.(Van Arkel/Leaching)

Nickel is refined by _____ process.(Monds/Van Arkel)

Name the method which is very useful for producing semiconductors.

In electrolytic refining, which metal is made anode?

State briefly the principle of refining by chromatography.

Write the principle of method used for the refining of germanium.

Write the principle of electrolytic refining.

Which methods are usually employed for purifying the Germanium metal ?

Which methods are usually employed for purifying the tin metal ?

A crude metal is heated with iodine to form metal tetraiodide which is decomposed on tungsten filament at $1800 \mathrm{K}$ to liberate pure metal. Give the name of this method.

${\mathrm{Zrl}}_4$ is converted to $\mathrm{Zr}$ by the _____.(Leaching process/Van-Arkel-de-Boer process)

Complete the following reaction-

${\mathrm{Cu}}_2\mathrm{S} + \_\_\_\_\_ \to \mathrm{Cu} + {\mathrm{SO}}_2$.

Complete the following reaction-

$2{\mathrm{Cu}}_2\mathrm{O} + {\mathrm{Cu}}_2\mathrm{S} \to$             +             

Give details of the following methods for refining of metals.

Zone refining

Give details of the following methods for refining of metals.

Poling

Give details of the following methods for refining of metals-

Electrolytic refining.

Draw diagram of Bessemer converter and why there is lining of silica for reduction of copper oxide.