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How does a basic toothpaste help after eating food?

Answer and explanation

Correct answer: It neutralizes acid formed in the mouth

The governing concept is neutralisation. After food remains in the mouth, bacteria may break down sugars and produce acids. These acids can attack tooth enamel and contribute to tooth decay. Basic toothpaste contains mildly alkaline substances that react with and reduce the effect of the acids. Therefore option A is correct. The other options are incorrect because toothpaste does not convert teeth into acid, stop saliva completely, or protect teeth by depositing ordinary salt.

Related tags

ToothpasteNeutralisationPhTooth EnamelAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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