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In the metallurgical extraction of copper, following reaction is used : FeO + SiO2 → FeSiO3 FeO and FeSiO3 respectively are.

1. Gangue and flux
2. Flux and slag
3. Slag and flux
4. Gangue and slag

Correct answer: Gangue and slag

Solution

FeO is considered gangue because it is an unwanted material that is removed during the extraction process, while FeSiO3 is the slag formed from the reaction, which helps in separating impurities from the metal.

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