Question

The balance reaction involved during extraction of zinc from its ore, by calcination of zinc ore, is:

• A. $2ZnC{O}_3\left(s\right)\stackrel{Heat}{\to }2ZnO\left(s\right)+C{O}_2\left(g\right)$
• B. $ZnC{O}_3\left(s\right)\stackrel{Heat}{\to }ZnO\left(s\right)+C{O}_2\left(g\right)$
• C. $ZnC{O}_3\left(s\right)\stackrel{Heat}{\to }2ZnO\left(s\right)+C{O}_2\left(g\right)$
• D. none of these

Answer 1

The correct option is B $ZnC{O}_3\left(s\right)\stackrel{Heat}{\to }ZnO\left(s\right)+C{O}_2\left(g\right)$

Calcination is defined as heating to high temperatures in the presence of air or oxygen. Heating the metal carbonates result in the formation of metal oxides and carbon dioxide.

$ZnC{O}_3\left(s\right)\stackrel{heat}{\to }ZnO\left(s\right)+C{O}_2\left(g\right)$