Question

Analyze the reaction given below:
$\text{A}\stackrel{Calcination}{\to }\text{CaO(s)}+\text{MgO(s)}+{\text{2CO}}_2\text{(g)}$
Find out A.

• A. ${\text{CaCO}}_3$
• B. ${\text{MgCO}}_3$
• C. ${\text{CaCO}}_3.{\text{MgCO}}_3$
• D. ${\text{CaSO}}_4.{\text{MgCO}}_3$

Answer 1

The correct option is C ${\text{CaCO}}_3.{\text{MgCO}}_3$

Calcination is a process in which the ore is heated strongly in the absence of air to remove volatile impurities. It thermally decomposes the carbonate. ${\text{CaCO}}_3.{\text{MgCO}}_3$ is called dolomite and is potentially an ore of both the metals - Ca and Mg. The calcination reaction of dolomite occurs as follows:
${\text{CaCO}}_3.{\text{MgCO}}_3\text{(s)}\stackrel{Calcination}{\to }\text{CaO (s)}+\text{MgO(s)}+2{\text{CO}}_2\text{(g)}$