MCQ
When does tooth decay occur?
- AWhen 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 .
- CWhen the pH of inner part of mouth is 5.5 .
- DWhen 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
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Statement A : All children will inherit an X-chromosome from their mother.
Reason R : Women have a perfect pair of both X-sex chromosome.
Which is correct option for Statement A and Reason R?
Reason R : Women have a perfect pair of both X-sex chromosome.
Which is correct option for Statement A and Reason R?
Through which of the following points, will a ray passing through the centre of curvature $(C)$ and reflected by a concave mirror pass?
→By whom the number of organisms are limited at trophic level of food chain?
Which of the following fuel does not leave ash$-$like residue while burning?
→When we blow air by mouth in the test tube containing lime water will change into milky white due to presence of which gas ?
Which of the following is obtained by the reduction of methanol?
Which scientist was the first to conduct systematic experiments for the study of heredity?
A virtual image of an object is formed by a mirror, then...
Which of the following is a plant hormone?
In the following figure, magnetic field of different current-carrying wires is shown. Which figure represents the correct direction of the magnetic field?
