Why is very low pH in the mouth dangerous for tooth decay?
Answer and explanation
Correct answer: Low pH increases acidity which damages tooth enamel
The pH scale shows acidity inversely: a lower pH means a greater concentration of hydrogen ions and a more acidic environment. Acids produced by bacteria can react with and dissolve minerals in tooth enamel, especially when the mouth remains acidic for a long time. This softens the enamel and promotes cavities. Hence A is correct; low pH is not basic, does not make teeth metallic, and is not harmless.
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What is the correct answer to this question?
Low pH increases acidity which damages tooth enamel
Why is this the correct answer?
The pH scale shows acidity inversely: a lower pH means a greater concentration of hydrogen ions and a more acidic environment. Acids produced by bacteria can react with and dissolve minerals in tooth enamel, especially when the mouth remains acidic for a long time. This softens the enamel and promotes cavities. Hence A is correct; low pH is not basic, does not make teeth metallic, and is not harmless.
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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