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Chemistry · 2018
JEE Main 2018 · 2018-04-08 Offline · Q41
The recommended concentration of fluoride ion in drinking water is up to 1 ppm as fluoride ion is required to make teeth enamel harder by converting…
The recommended concentration of fluoride ion in drinking water is up to $\displaystyle 1$ ppm as fluoride ion is required to make teeth enamel harder by converting $\displaystyle \left[3 \mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \cdot \mathrm{Ca}(\mathrm{OH})_2\right]$ to :
Official answer
(3)
$\displaystyle \left[3 \mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \cdot \mathrm{CaF}_2\right]$
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JEE Main 2018 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.