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Tooth decay can increase below which pH?

Answer and explanation

Correct answer: 5.5 / Five point five

The governing concept is the effect of acidity on tooth enamel. When the pH in the mouth falls below about 5.5, the medium becomes sufficiently acidic to promote demineralisation of enamel, especially if acids remain in contact with the teeth. This increases the risk of tooth decay, so option A is correct. pH 7 is neutral, while pH 10 and pH 14 are alkaline and do not represent the critical acidic threshold.

Related tags

ScienceClass10Acids-Bases-SaltsTooth-DecayPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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