Question

Calcination is the process in which:

• A. ore is heated above its melting point to expel $H_2O$ or $CO_2$ or $SO_2$
• 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 $SO_2$, $As_2O_3$ and $Sb_2O_3$ respectively
• D. ore is heated below its melting point to expel $H_2O$ or $CO_2$

Answer 1

Answer: (D)

ore is heated below its melting point to expel $H_2O$ or $CO_2$

Answer 2

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.