The importance of many pure substance in
life depends on their composition".
which of the following statement justify the
above fact?
(a) 1 ppm of fluoride ions in water prevents tooth decay
(b) 1.5 ppm of fluoride ions causes tooth decay
(C) concentration above 1.5ppm can be poisonous.
(d) All of the above
Answers
Answer:
all of the above.The importance of many pure substance in
life depends on their composition".
Answer:
The correct option to this question is (d) All of the above.
Explanation:
1 ppm of fluoride ions in water prevents tooth decay:
By attaching to tooth enamel, the hard outer layer, fluoride helps to prevent cavities. Hydroxyapatite, a crystal consisting of calcium, phosphorus, hydrogen, and oxygen, makes up the majority of its composition.
1.5 ppm of fluoride ions causes tooth decay:
Fluoride hardens the enamel when it is integrated into teeth, due to its resistance to demineralization, which is the main cause of tooth decay and cavities.
Concentration above 1.5ppm can be poisonous:
According to the World Health Organization (WHO), prolonged exposure to water that has more fluoride than 1.5 ppm can have negative health effects. Dental fluorosis is caused by fluoride levels in drinking water that are higher than 1.5 ppm.
Thus, the ideal fluoride concentration for preventing tooth decay is defined by the Department of Health and Human Services (DHHS).