What is the chemical benefit of basic toothpaste for teeth?
Answer and explanation
Correct answer: It neutralises acids in the mouth
The governing concept is acid–base neutralisation. Bacteria in the mouth can convert food sugars into acids, which lower pH and attack enamel. A mildly basic toothpaste reacts with or neutralises some of these acids, reducing their harmful effect and helping the mouth return toward a safer pH. Therefore option A is correct. It should not dissolve enamel, force pH to zero, or increase acidity.
Frequently asked questions
What is the correct answer to this question?
It neutralises acids in the mouth
Why is this the correct answer?
The governing concept is acid–base neutralisation. Bacteria in the mouth can convert food sugars into acids, which lower pH and attack enamel. A mildly basic toothpaste reacts with or neutralises some of these acids, reducing their harmful effect and helping the mouth return toward a safer pH. Therefore option A is correct. It should not dissolve enamel, force pH to zero, or increase acidity.
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.
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