Heating a mixture of phosphate rock, coke and sand in an electric furnace produces___________________?
Correct answer: C. Phosphorous
- A. Phosphoric acid
- B. Ammonium phosphate
- C. Phosphorous
- D. Superphosphate
Explanation
In the electric-furnace process, phosphate rock is reduced by coke in the presence of silica, producing elemental phosphorus vapour that is then condensed. Phosphoric acid is produced in the wet process rather than directly in this furnace reaction.
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