Question

What is the difference between roasting and calcination. Give one example for each

Answer 1

Explanation:

1. roasting is heated in the excess presence of oxygen or air
2. calcination is heated in the limited presence of oxygen or air

Answer 2

Answer:Roasting:Roasting is the heating of a metal ore in the presence of excess air or oxygen. This process involves solid-gas reactions. The aim of this process is to purify metals from their ore.

Example of Roasting: carbon

calcination: calcination is the process of converting hydroxide and carbonate ores to oxides by heating the ores either in the absence or in a limited supply of air at a temperature below the melting point of the metal.

Example of calcination:  A typical example is the manufacture of lime from limestone

Explanation: