A) reducing agent
B) flux
C) slag
D) gangue
Correct Answer: B
Solution :
Lime stone is a flux. Ore contains some impurities which have high melting point. Flux is used to remove these infusible impurities in the form of fusible slag. Infusible impurities \[+\text{ }flux=fusible\text{ }siag\] In the metallurgy of iron to remove the acidic impurity of \[Si{{O}_{2}}\] present, a basic flux lime stone \[(CaC{{O}_{3}})\]isused. \[CaC{{O}_{3}}\xrightarrow{{{800}^{o}}C}CaO+C{{O}_{2}}\] \[CaO+Si{{O}_{2}}\xrightarrow{{{1000}^{o}}C}\underset{\begin{smallmatrix} calcium\,slicate \\ (slag) \end{smallmatrix}}{\mathop{CaSi{{O}_{3}}}}\,\]
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