Which of the following ore is not concentrated by froth floatation process?
Pyrolusite (MnO2) is not a sulphide ore, so it is not concentrated by froth floatation process.
The electrolytic method of reduction is employed for the preparation of metals that
In alumino-thermite process, aluminium is used as
In the metallurgical extraction of zinc from ZnO, the reducing agent used is
In order to refine blister copper, it is melted in a furnace and is stirred with green logs of wood. The purpose is
The slag obtained during the extraction of copper from copper pyrites is composed of
Purest form of iron is
The cyanide process is used for obtaining
Of the following, which cannot be obtained by electrolysis of the aqueous solution of their salts?
Mond’s process is used for the purification of
Thermite is a mixture of