How does basic toothpaste protect teeth?
Answer and explanation
Correct answer: By neutralising acid formed in the mouth
After food is eaten, oral bacteria can produce acids from fermentable sugars. These acids lower the pH and may attack tooth enamel, increasing the risk of decay. A basic toothpaste supplies alkaline substances that neutralise some of the excess acid and help move the mouth toward a safer pH. It does not dissolve enamel or make pH zero. Therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
By neutralising acid formed in the mouth
Why is this the correct answer?
After food is eaten, oral bacteria can produce acids from fermentable sugars. These acids lower the pH and may attack tooth enamel, increasing the risk of decay. A basic toothpaste supplies alkaline substances that neutralise some of the excess acid and help move the mouth toward a safer pH. It does not dissolve enamel or make pH zero. Therefore option A is correct.
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.
