Question

Flux added in the extraction of iron is.

• A. Silica
• B. Felspar
• C. Limestone
• D. Flint

Answer 1

Answer: (C)

Limestone

Answer 2

Impurities of $\mathrm { SiO } _ { 2 }$ is present in the iron ore so basic flux $\mathrm { CaCO } _ { 3 }$ is added. $\underset { \text { Flux } } { \mathrm { CaO } } + \underset { \text { Impurity } } { \mathrm { SiO } _ { 2 } } \rightarrow \underset { \text { Slag } } { \mathrm { CaSiO } _ { 3 } }$