Which one of mentioned below is not used as mined rock impurity in the production of phosphoric acid?(a) Aluminum(b) Silicon(c) Arsenic(d) Iron-oxidesI had been asked this question in an online quiz.My question is taken from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology

Which one of mentioned below is not used as mined rock impurity in the

1.	Which one of mentioned below is not used as mined rock impurity in the production of phosphoric acid?(a) Aluminum(b) Silicon(c) Arsenic(d) Iron-oxidesI had been asked this question in an online quiz.My question is taken from Inorganic Chemical topic in section Inorganic Chemical Industries of Chemical Technology
Answer» Correct answer is (c) Arsenic For EXPLANATION I WOULD say: EXCEPT arsenic all are such as aluminium, silicon, Iron-oxide are considered as mined rock impurity. The high grade of imported ore is NECESSARY to AVOID solubilization of these mined rock impurities.

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