Question

differences between roasting and calsination any .2 points .​

Answer 1

ANSWER:-

Calcination is a process in which an ore is heated in the absence of air or air might be supplied in limited quantity.

 Roasting involves heating of ore higher than its melting point in the presence of air or oxygen.

Answer 2

Answer:

roasting:-

• conversion of sulphite ore into metal oxide.
• this process occur in presence of air.
• example:- ZnS may yield ZnO

calcination:-

• conversion of carbonate ore into metal oxide.
• this process occur in absence or limited amount of air
• example:- zinc carbonate decomposes to give zinc oxide and carbon dioxide.

hope it helps you.....