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  4. The substance, which is added to ore in order to remove impurities during smelting, is known as:

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Q. The substance, which is added to ore in order to remove impurities during smelting, is known as:

JIPMERJIPMER 2002General Principles and Processes of Isolation of Elements

Solution:

Flux is added to roasted ore in order to remove impurities in form of slag, which floats above the molten reduced metal in smelting process, e.g., $ \underset{\begin{smallmatrix} \,\,\,\,\,\,\text{Impurity}\,\text{in} \\ \text{iron-extraction} \end{smallmatrix}}{\mathop{MnO}}\,+\underset{\text{flux}}{\mathop{Si{{O}_{2}}}}\,\xrightarrow{{}}\underset{\text{Slag}}{\mathop{MnSi{{O}_{3}}}}\, $