Question

write any two difference between calcination and roasting.​

Answer 1

The main difference between roasting and calcination is that roasting involves the heating of ore in the presence of excess air or oxygen whereas calcination involves the heating of ore in the presence of limited air or oxygen.

Answer 2

$\huge\bf{\orange{\mid{\overline{\underline{Answer\:with\:Explanation}}}\mid}}$

$\bold{\small{\color{blue}{Calcination:}}}$

1. Calcination is the process of heating the ore below it's melting point in the absence of air or in the absence of oxygen.

2. As a result of calcination, the carbonate ore is converted to the oxide form.

$\bold{\small{\color{red}{Reaction:}}}$

$ZnCO_3(s) ----> ZnO(s) + CO_2(g)$

$\bold{\small{\color{blue}{Roasting:}}}$

1. The process of heating the ore below its melting point with excess of air or oxygen.

2. As a result of roasting, the sulphide ore is converted to the oxide form.

$\bold{\small{\color{red}{Reaction:}}}$

$2ZnS(s) + 3O_2(g) ----> 2ZnO(s) + 2SO_2(g)$