How does basic toothpaste help protect teeth?
Answer and explanation
Correct answer: By neutralising acid in the mouth
After eating, oral bacteria may produce acids from sugars, lowering the pH at the tooth surface and promoting enamel demineralisation. A mildly basic toothpaste helps neutralise some of these acids, reducing acidity and supporting tooth protection. Therefore option A is correct. Dissolving enamel, making pH zero, or increasing acid would worsen damage rather than prevent it.
Frequently asked questions
What is the correct answer to this question?
By neutralising acid in the mouth
Why is this the correct answer?
After eating, oral bacteria may produce acids from sugars, lowering the pH at the tooth surface and promoting enamel demineralisation. A mildly basic toothpaste helps neutralise some of these acids, reducing acidity and supporting tooth protection. Therefore option A is correct. Dissolving enamel, making pH zero, or increasing acid would worsen damage rather than prevent it.
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.
