A) ore is heated above its melting point to expel \[{{H}_{2}}O\] or \[C{{O}_{2}}\] or \[S{{O}_{2}}\]
B) ore is heated below its melting point to expel volatile impurities
C) ore is heated above its melting point to remove S, As and Sb as \[S{{O}_{2}},\,\,A{{s}_{2}}{{O}_{3}}\] and \[S{{b}_{2}}{{O}_{3}}\] respectively
D) ore is heated below its melting point to expel \[{{H}_{2}}O\] or \[C{{O}_{2}}\]
Correct Answer: D
Solution :
[d] Calcination is a process of heating a substance to a high temperature but below the melting or fusion point, causing loss of moisture, reduction or oxidation and dissociation into simpler substances.
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