The material that is mixed before the ore is subjected to smelting in the extraction of iron is

limestone and silica

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coke and silica

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coke and limestone

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coke, limestone, and silica

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Solution

The correct option is C coke and limestone
Smelting is the process of obtaining a metal from its ore by heating the ore beyond the melting point in oxidizing or reducing agents.
For smelting, we require a reducing agent and a flux to get the pure metal.
Coke and limestone act as reducing agents and flux respectively.

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