Main constituent of phosphate rock is_____________________?
Correct answer: C. Flour apatite
- A. Ammonium phosphate
- B. Calcium fluoride
- C. Flour apatite
- D. Calcium phosphate
Explanation
Phosphate rock consists mainly of apatite, especially fluorapatite, a calcium phosphate mineral containing fluoride. “Flour apatite” is a misspelling of fluorapatite, but it is the intended option.
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