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JEE Main2016ChemistryGeneral Principles and Processes of Isolation of MetalsActual

Extraction of copper by smelting uses silica as an additive to remove.

Options

  1. AC u 2 O
  2. BF e S
  3. CF e O
  4. DC u 2 S

Correct answer

C. F e O

Step-by-step solution

Smelting is a form of extractive metallurgy to produce a metal from its ore. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gasses or slag and leaving just the metal behind. The reducing agent is commonly a source of carbon such as coke, charcoal, and coal. FeO   is gangue and S i O 2 is flux to form slag F e S i O 3 . F e O + S i O 2 → F e S i O 3

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