Phosphoric acid is prepared from_____________________?
Correct answer: C. Rock phosphate
- A. Cryolite
- B. Chalcopyrite
- C. Rock phosphate
- D. None of these
Explanation
Phosphoric acid is manufactured industrially from phosphate rock, commonly by reacting it with sulfuric acid in the wet process. Cryolite and chalcopyrite are ores of aluminium and copper, respectively.
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