Wolframite ore is separated from tinstone ore by the process of

In metallurgy,the term "gangue" is used for:

Chemical leaching is useful in the concentration of

How can you separate alumina from silica in bauxite ore associated with silica? Give equations,if any.

Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?

When $ZnS$ and $PbS$ minerals are present together,then $NaCN$ is added to separate them in the froth floatation process as a depressant,because