Describe roasting of ZnS.

The roasting of an ore of a metal usually results in conversion of the metal ore to the oxide. Why does the roasting of cinnabar, (HgS) produce metallic mercury rather than an oxide of mercury?

Why is partial roasting of sulphide ore done in metallurgy of copper ?

Which of the following processes involves the roasting process ?

Describe the construction and working of Daniell cell. The following reaction occurs in a cell Zn (s) + Co^(2+) ( aq) hArr Co(s) + Zn^(2+)(aq) Write the electrode reaction and find out the emf of the cell. Given Zn(s) rarr Zn^(2+)(aq) , E^(@) = 0.76 V CO(s) rarr Co^(2+)(aq) , E^(@) = 0.28V

What is roasting?