Ores are usually contaminated with earthly or undesired materials known as

The method used for refining of nickel is known as

Which is used for making cycles and automobiles?

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

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

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

German Silver is an alloy of

Which is extracted by hydro metallurgy from low grade ores?

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