Question

Calcination is used in metallurgy for removal of.

• A. Water and sulphide
• B. Water and $\mathrm { CO } _ { 2 }$
• C. $\mathrm { CO } _ { 2 }$ and $\mathrm { H } _ { 2 } \mathrm {~S}$
• D. $\mathrm { H } _ { 2 } \mathrm { O }$ and $\mathrm { H } _ { 2 } \mathrm {~S}$

Answer 1

Answer: (B)

Water and $\mathrm { CO } _ { 2 }$

Answer 2

$\mathrm { ZnCO } _ { 3 } \rightarrow \mathrm { ZnO } + \mathrm { CO } _ { 2 }$

In calcination ore is heated in absence of air in a reverberatory furnace to remove moisture and $\mathrm { CO } _ { 2 }$