How does a basic toothpaste help after eating food?
Answer and explanation
Correct answer: It neutralizes acid formed in the mouth
The governing concept is neutralisation. After food remains in the mouth, bacteria may break down sugars and produce acids. These acids can attack tooth enamel and contribute to tooth decay. Basic toothpaste contains mildly alkaline substances that react with and reduce the effect of the acids. Therefore option A is correct. The other options are incorrect because toothpaste does not convert teeth into acid, stop saliva completely, or protect teeth by depositing ordinary salt.
Frequently asked questions
What is the correct answer to this question?
It neutralizes acid formed in the mouth
Why is this the correct answer?
The governing concept is neutralisation. After food remains in the mouth, bacteria may break down sugars and produce acids. These acids can attack tooth enamel and contribute to tooth decay. Basic toothpaste contains mildly alkaline substances that react with and reduce the effect of the acids. Therefore option A is correct. The other options are incorrect because toothpaste does not convert teeth into acid, stop saliva completely, or protect teeth by depositing ordinary salt.
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.
