Question

The chemical reaction of calcium carbonate while heating is given .
$CaC{O}_2\stackrel{Heat}{\to }CaO+C{O}_2$
How the reaction is made use in the metallurgy of iron ?

Answer 1

The above reaction is used in the metallurgy of iron:

$CaO$ is formed by the decomposition of $CaC{O}_3$. This $CaO$ acts as a flux and combines with $Si{O}_2$ (gangue) to form $CaSi{O}_3$ (Slag).