Below which pH can tooth decay start more rapidly?
Answer and explanation
Correct answer: About 5.5
Bacteria in the mouth can convert food sugars into acids. When the pH around the teeth falls below about 5.5, the mineral hydroxyapatite in enamel can begin to dissolve more readily, increasing the risk of dental caries. Hence option B is correct. A pH of 7 is neutral, while 10 and 14 are alkaline and do not represent the critical acidic threshold.
Frequently asked questions
What is the correct answer to this question?
About 5.5
Why is this the correct answer?
Bacteria in the mouth can convert food sugars into acids. When the pH around the teeth falls below about 5.5, the mineral hydroxyapatite in enamel can begin to dissolve more readily, increasing the risk of dental caries. Hence option B is correct. A pH of 7 is neutral, while 10 and 14 are alkaline and do not represent the critical acidic threshold.
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.
