Tooth decay starts rapidly when the pH falls below which value?
Answer and explanation
Correct answer: About 5.5
Mouth bacteria break down sugars and produce acids. As the pH decreases, the acidic environment begins to dissolve the mineral component of tooth enamel. Tooth decay becomes rapid when the pH falls below about 5.5, making option A correct. A pH of 7 is neutral, while 8.5 and 14 are alkaline values and do not represent the acidic condition that attacks enamel. Regular cleaning helps limit this process.
Frequently asked questions
What is the correct answer to this question?
About 5.5
Why is this the correct answer?
Mouth bacteria break down sugars and produce acids. As the pH decreases, the acidic environment begins to dissolve the mineral component of tooth enamel. Tooth decay becomes rapid when the pH falls below about 5.5, making option A correct. A pH of 7 is neutral, while 8.5 and 14 are alkaline values and do not represent the acidic condition that attacks enamel. Regular cleaning helps limit this process.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
