Reaction of ______________ acid with phosphate rock produces superphosphates?
Correct answer: B. Sulphuric
- A. Hydrochloric
- B. Sulphuric
- C. Nitric
- D. Phosphoric
Explanation
Sulphuric acid reacts with phosphate rock to form ordinary superphosphate, mainly monocalcium phosphate mixed with gypsum. Phosphoric acid is used instead when manufacturing triple superphosphate.
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