Why is rinsing the mouth after meals helpful in protecting tooth enamel?
Answer and explanation
Correct answer: It helps reduce acids formed in the mouth
After meals, bacteria may break down sugars and produce acids. These acids lower the mouth’s pH and can gradually demineralise the calcium-containing enamel. Rinsing with water helps remove food residues and dilute or reduce the acidic material, limiting its contact with enamel. Hence option A is correct. The other choices either reverse the effect or make scientifically impossible claims.
Frequently asked questions
What is the correct answer to this question?
It helps reduce acids formed in the mouth
Why is this the correct answer?
After meals, bacteria may break down sugars and produce acids. These acids lower the mouth’s pH and can gradually demineralise the calcium-containing enamel. Rinsing with water helps remove food residues and dilute or reduce the acidic material, limiting its contact with enamel. Hence option A is correct. The other choices either reverse the effect or make scientifically impossible claims.
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.
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