Concentration of Ores

In the process of extraction of gold,
$\left[\mathrm{X}\right]+\mathrm{Zn}\stackrel{}{\to }\left[\mathrm{Y}\right]+\mathrm{Au}$

concentration of copper glance is done by

For which of the following ores, froth floatation process is applicable?

Ore dressing of iron ore is done by

Which of the following benefaction processes is used for the mineral, ${\mathrm{Al}}_2{\mathrm{O}}_3.2{\mathrm{H}}_2\mathrm{O}$?

For which of the following ores, froth floatation process is applicable?

The role of $\mathrm{NaCN}$ in the separation of $\mathrm{PbS}$ and $\mathrm{ZnS}$ by froth floatation method is

In the electrolytic refining of $\mathrm{Cu}$

In the froth floatation process the collectors such as pine oils and xanthates etc. enhance

Leaching is used for the concentration of ores of

Concentration of copper glance is done by

Which of the following metal can be extracted without using reducing agent?

The silver complex formed during cyanide process is

Which of the following is not a concentration technique?

The ores that are concentrated by Froth flotation method are

The metal which is not present in german silver is

Which of the following is not a method of concentration of ores?

The process of leaching cannot be done for the extraction of

Which of the following is leached with $\mathrm{NaCN}?$