What is Calcination ?

What are calcination and roasting ? In which type of ores are these processes used

(a) What are calcination and roasting ? In which type of ores are these processes used ? (b) Which metals are generally extracted by electrolyte processes ? What position do these metals occupy in the periodic table ?

What do you mean by calcination ?

What types of ores are subjected to calcination ?

What types of ores are subjected to calcination ?