Electric furnace method for production of phosphorous uses phosphate rock and _________________________?
Correct answer: C. Silica and coke
- A. Phosphoric acid
- B. Coke
- C. Silica and coke
- D. Sulphuric acid
Explanation
In the electric-furnace process, phosphate rock is heated with silica and coke. Silica combines with calcium as slag, while coke reduces phosphate to elemental phosphorus.
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