Tooth decay damages enamel more when the pH falls below which approximate value?
Answer and explanation
Correct answer: 5.5
Bacteria in the mouth can use sugars to produce acids. As the pH of the mouth falls below about 5.5, the mineral component of tooth enamel begins to dissolve more readily, increasing the risk of decay. Therefore, option A is correct. A pH of 7 is neutral, while 8.5 and 14 represent alkaline conditions and do not describe the critical acidic level for enamel damage.
Frequently asked questions
What is the correct answer to this question?
5.5
Why is this the correct answer?
Bacteria in the mouth can use sugars to produce acids. As the pH of the mouth falls below about 5.5, the mineral component of tooth enamel begins to dissolve more readily, increasing the risk of decay. Therefore, option A is correct. A pH of 7 is neutral, while 8.5 and 14 represent alkaline conditions and do not describe the critical acidic level for enamel damage.
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.
