The ore is heated in a regular supply of air in a furnace at a temperature below the melting point of the metal is called as

The method which is very useful for removing all the Oxygen and Nitrogen present in the form of impurity in certain metals like Zr and Ti is

Which is used for casting stoves, railway sleepers, gutter pipes, toys etc..

German Silver is an alloy of

The diagrams help us in predicting the feasibility of thermal reduction of an ore is

The Chromatography which is very useful for purification of the elements are available in minute quantities and the impurities are not very different in chemical properties is

Which is extracted by hydro metallurgy from low grade ores?

The method used for refining of nickel is known as

Ores are usually contaminated with earthly or undesired materials known as