The metal extracted by leaching with cyanide is :
When the sample of Cu with Zn impurity is to be purfied by electrolysis, the appropriate electrodes are :
Aluminium is industrially prepared by -
The substance not likely to contain CaCO3 is –
Which one of the following ores is best concentrated by froath-flotation method ?
During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are –
Heating mixture of Cu2O and Cu2S will give –
Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting the sulphide ores to carbon reduction directly ?
Metal sulphides are less stable than the corresponding oxides