Question

Calcination is the process of heating the ore:

• A.
  In inert gas
• B.
  In the presence of air
• C.
  In the absence of air
• D.
  In the presence of $CaO$ and $MgO$

Answer 1

The correct option is C

In the absence of air
Calcination is the process of heating the ore in the absence of air.
Calcinaton involves heating when the volatile matter escapes leaving behind the metal oxide.
$F{e}_2{O}_3.x{H}_{2}O\left(s\right)\stackrel{\Delta }{\to }F{e}_2{O}_3\left(s\right)+x{H}_{2}O\left(g\right)ZnC{O}_3\left(s\right)\stackrel{\Delta }{\to }ZnO\left(s\right)+C{O}_2\left(g\right)CaC{O}_3.MgC{O}_3\left(s\right)\stackrel{\Delta }{\to }CaO\left(s\right)+MgO\left(s\right)+2C{O}_2\left(g\right)$