JEE Main 2021 — Environmental Chemistry Question with Solution
From: JEE Main 2021 (Online) 26th August Morning Shift
Question
The conversion of hydroxyapatite occurs due to presence of F ions in water. The correct formula of hydroxyapatite is :
Choose an option
Show full solutionCorrect option: A
Correct answer
A[3Ca3(PO4)2 . Ca(OH)2]
Step-by-step explanation
The F ions make the enamel on teeth much harder by converting hydroxyapatite, [3Ca3(PO4)2] . Ca(OH)2], the enamel on the surface of the teeth into much harder fluroappatite. [3Ca3(PO4)2 . CaF2]
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This is a previous-year question from JEE Main 2021, covering the Environmental Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.