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प्रश्न
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 [3Ca3(PO4)2 . Ca(OH2)] to ______.
पर्याय
[CaF2]
[3(CaF2) . Ca(OH)2]
[3Ca3(PO4)2 . CaF2]
[3{Ca(OH)2} . CaF2]
MCQ
रिकाम्या जागा भरा
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उत्तर
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 [3Ca3(PO4)2 . Ca(OH2)] to [3Ca3(PO4)2 . CaF2].
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