A) \[2Ag+2HCl+[O]\xrightarrow{{}}2AgCl+{{H}_{2}}O\]
B) \[2Zn+{{O}_{2}}\xrightarrow{{}}2ZnO\]
C) \[2ZnS+3{{O}_{2}}\xrightarrow{{}}2ZnO+2S{{O}_{2}}\]
D) \[MgC{{O}_{3}}\xrightarrow{{}}MgO+C{{O}_{2}}\]
Correct Answer: D
Solution :
The process of conversion of a concentrated on 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, \[MgC{{O}_{3}}\xrightarrow{\Delta }MgO+C{{O}_{2}}\]is an example of calcination process.
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