Question

Why does tooth decay start when the pH of mouth is lower than 5.5

SCERT Telangana Class 10 General Science Ch Acid Bases and Salts

Answer 1

When we eat for it contains sugar,then the bacteria present in our mouth break down the sugar to form acids.Tooth decay starts when pH is lower than 5.5 this is because the acid is strong enough to attack the enamel of our teeth and corrode it.This starts the tooth decay.

Answer 2

Explanation:

bacteria present in the mouth produce acid by degradation of sugar and food particles which remain in the mouth after eating the acid produced in the mouth attack the unable thereby creating tooth decay