Which of the following ions present in low concentration in drinking water is essential for normal g...........

Everyday Science General Science

Which of the following ions present in low concentration in drinking water is essential for normal growth of teeth but harmful to teeth at high concentration?

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CAPF 2014 Paper-1

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Aluminium

Calcium

Fluoride

Chloride

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Explanation:

Water fluoridation is the controlled addition of fluoride to a public water supply to reduce tooth decay. Fluoridated water contains fluoride at a level that is effective for preventing cavities; this can occur naturally or by adding fluoride.