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 removes 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 :
Calcination is a thermal treatment process in presence of air to ores and other solid materials to bring about a thermal decomposition. Phase transition or removal of volatile fraction.
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