What is the reason for keeping toothpaste mildly basic?
Answer and explanation
Correct answer: To neutralise acids formed in the mouth
The governing concept is acid–base neutralisation in dental care. Oral bacteria can convert sugars into acids, lowering the pH around tooth enamel and encouraging demineralisation. Mildly basic substances in toothpaste help neutralise some of these acids and support a safer oral pH. Thus option A is correct. The other choices would damage teeth, introduce a harmful gas, or worsen the conditions that support decay.
Frequently asked questions
What is the correct answer to this question?
To neutralise acids formed in the mouth
Why is this the correct answer?
The governing concept is acid–base neutralisation in dental care. Oral bacteria can convert sugars into acids, lowering the pH around tooth enamel and encouraging demineralisation. Mildly basic substances in toothpaste help neutralise some of these acids and support a safer oral pH. Thus option A is correct. The other choices would damage teeth, introduce a harmful gas, or worsen the conditions that support decay.
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.
