Which condition is more favourable for the beginning of tooth decay?
Answer and explanation
Correct answer: Mouth pH is below 5.5
Tooth enamel is damaged more readily when the mouth becomes acidic. A pH below about 5.5 is commonly taken as the critical level at which enamel minerals begin to dissolve more significantly, increasing the risk of decay. Therefore, option B is correct. A neutral pH near 7 and absence of acid are less favourable for decay, while pH 14 is strongly alkaline and not the stated condition.
Frequently asked questions
What is the correct answer to this question?
Mouth pH is below 5.5
Why is this the correct answer?
Tooth enamel is damaged more readily when the mouth becomes acidic. A pH below about 5.5 is commonly taken as the critical level at which enamel minerals begin to dissolve more significantly, increasing the risk of decay. Therefore, option B is correct. A neutral pH near 7 and absence of acid are less favourable for decay, while pH 14 is strongly alkaline and not the stated condition.
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.
