A solution has pH below 5.5. What is the most correct meaning in the context of teeth?
Answer and explanation
Correct answer: It can be harmful to tooth enamel
The governing concept is the relationship between pH and acid attack on tooth enamel. A pH below 5.5 indicates an acidic environment. Tooth enamel is mainly a calcium phosphate mineral, and acids can react with it, gradually dissolving or demineralising the surface. Therefore frequent or prolonged exposure to such a solution may damage enamel and contribute to tooth decay. Option A is correct. The solution is not neutral or necessarily basic, and low pH does not strengthen teeth.
Frequently asked questions
What is the correct answer to this question?
It can be harmful to tooth enamel
Why is this the correct answer?
The governing concept is the relationship between pH and acid attack on tooth enamel. A pH below 5.5 indicates an acidic environment. Tooth enamel is mainly a calcium phosphate mineral, and acids can react with it, gradually dissolving or demineralising the surface. Therefore frequent or prolonged exposure to such a solution may damage enamel and contribute to tooth decay. Option A is correct. The solution is not neutral or necessarily basic, and low pH does not strengthen teeth.
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.
