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Fluorex is a special mixture of ____________

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Fluorex is a special mixture of ____________

(a) Di-calcium phosphate and carbon

(b) Tri-calcium phosphate and hydroxyapatite

(c) Di-calcium phosphate and phosphoric acid

(d) Tri-calcium phosphate and carbon

I got this question in homework.

This intriguing question comes from Fluoridation and Defluoridation in division Miscellaneous Treatment Methods of Environmental Engineering

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Right answer is (b) Tri-calcium phosphate and hydroxyapatite

Easy explanation: Fluorex is used for removing fluoride and it is a special mixture of tri-calcium phosphate and hydroxyapatite. It is used as a filter medium.

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