Question

12 Assertion : Tooth decay starts when the pH of the mouth is lower than 5.5. Reason: Enamel starts corroding below 5.5 pH. *​

Answer 1

Answer:

The tooth decay got started when acids are produced by action of bacteria on sugars and food particles which tend to soften the enamel. Bacteria in the mouth produce acids by the process of oxidation and the tooth decay starts when pH of mouth is below 5.5.

Explanation:

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