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SSC MTS 2022 PYQ — Question 27

SSC MTS - 20 July 2022 - Shift 1 • General Awareness • Q27

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Tooth decay starts when the pH of the mouth is lower than _______.

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Correct answer: A

Explanation

The correct answer is option 1 i.e. 5.5

  • Tooth decay starts happening when the pH level of the mouth goes below 5.5.
  • The tooth enamel is made up of calcium phosphate which is the hardest substance in the body, it does not dissolve in water but can corrode if it gets suitable environment.
  • Therefore, when the mouth turns acidic, the process of corrosion starts taking place, hence the enamel starts decaying leading to mouth ulcers and other diseases.