During roasting of concentrated zinc sulphide ore, which of the following gets formed ?

Sulphide ore of Zinc is

Roasting of concentrated zinc sulphide ore is completed at the temperature of 1200 K to __________.

During roasting of zinc, zinc blende , it convets to :

During roasting of zinc blende, it converts to

How is zinc extracted from its sulphide ore ?

How is zinc extracted from its sulphide ore ?

During the concentration of sulphide ores by froth floatation process, the separation of sphalerite and galena is achieved by which of the following substances used as depressant?