Question

Which of the following reaction is an example of calcination process?

• A. $2 Ag +2 HCl +[ O ] \longrightarrow 2 AgCl + H _{2} O$
• B. $2 Zn + O _{2} \longrightarrow 2 ZnO$
• C. $2 ZnS +3 O _{2} \longrightarrow 2 ZnO +2 SO _{2}$
• D. $MgCO _{3} \longrightarrow MgO + CO _{2}$

Answer 1

Answer: (D)

$MgCO _{3} \longrightarrow MgO + CO _{2}$

Answer 2

The process of conversion of a concentrated ore into its oxide by heating in absence or in limited supply of air is called calcination. It is usually done for hydroxide and carbonate ores. Thus, $MgCO _{3} \xrightarrow{\Delta}MgO + CO _{2}$ is an example of calcination process.