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PART - 1 CH - 2 Acids, Bases and Salts — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10SciencePART - 1 CH - 2 Acids, Bases and Salts1 Mark
MCQ
When does tooth decay occur?
  • A
    When the pH of inner part of mouth is lower than 5.5 .
  • ✓
    When the pH of inner part of mouth is higher than 5.5 .
  • C
    When the pH of inner part of mouth is 5.5 .
  • D
    When the pH of inner part of mouth is 7.0 .
✓

Answer

Correct option: B.
When the pH of inner part of mouth is higher than 5.5 .
B

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