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If the pH around teeth falls below 5.5, which process can start?

Answer and explanation

Correct answer: Dissolving of enamel

When oral bacteria metabolise sugars, they produce acids that lower the pH near the teeth. Tooth enamel, which is mainly a mineral containing calcium compounds, begins to lose minerals when the surrounding pH falls below its critical value of about 5.5. Therefore option A is correct. The other choices do not describe acid attack or the chemistry of tooth decay.

Related tags

Tooth DecayEnamelPhAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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