How does basic toothpaste protect teeth?
Answer and explanation
Correct answer: By neutralising acid formed in the mouth
Bacteria in the mouth can convert food particles, especially sugars, into acids. These acids lower the local pH and may attack tooth enamel. Basic toothpaste contains mildly alkaline substances that react with and neutralise excess acid, helping to reduce acidity and protect enamel. It does not dissolve enamel, make the pH zero, or increase acid. Therefore option A correctly describes neutralisation.
Frequently asked questions
What is the correct answer to this question?
By neutralising acid formed in the mouth
Why is this the correct answer?
Bacteria in the mouth can convert food particles, especially sugars, into acids. These acids lower the local pH and may attack tooth enamel. Basic toothpaste contains mildly alkaline substances that react with and neutralise excess acid, helping to reduce acidity and protect enamel. It does not dissolve enamel, make the pH zero, or increase acid. Therefore option A correctly describes neutralisation.
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.
