Chemistry
(a) Name the methods by which concentrated ore is converted to metallic oxide
(b) State three objectives achieved during the roasting of ores.
Related Questions
Name:
(a) the processes involved in (i) dressing of the ores (ii) refining of the ores.
(b) two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen.
Give the principles of:
(a) Hydrolytic method
(b) Froth floatation process
(c) Electromagnetic separation
(a) Define roasting. Name an ore on which roasting is done. Give balanced equation.
(b) Define calcination. Give an example and equation for calcination.
Why does iron or zinc not occur free in nature?