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To protect tooth enamel from decay, pH should be prevented from falling below which approximate value?

Answer and explanation

Correct answer: 5.5

Tooth enamel contains calcium phosphate minerals that can be attacked by acids. When the pH in the mouth falls below approximately 5.5, demineralisation of enamel becomes significant and decay may begin. A pH of 7 is neutral but is not the specific critical value asked here; pH 9 and 14 are alkaline. Thus the appropriate answer is 5.5, option A.

Related tags

Tooth-DecayPh-ScaleAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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