JEE Main 2020 — Environmental Chemistry Question with Solution
From: JEE Main 2020 (Online) 6th September Morning Slot
Question
The presence of soluble fluoride ion upto
1 ppm concentration in drinking water, is :
Choose an option
Show full solutionCorrect option: A
Correct answer
Asafe for teeth
Step-by-step explanation
Fluoride (F–) ion conc upto 1 ppm makes the
enamel of teeth much harder by converting.
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This is a previous-year question from JEE Main 2020, 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.