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Why does tooth decay start when the pH o...

Why does tooth decay start when the pH of mouth is lower than 5.5?

A

more than 5.5

B

less than 5.5

C

less than 4.5

D

more than 4.5

Text Solution

Verified by Experts

The correct Answer is:
B
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The enamel of the teeth is made of a compound 'X'. It is the hardest substance of the body. It does not dissolve in water but gets corroded when the pH of mouth is lowered below 5.5 (a) Identify the compound 'X' (b) How does it undergo damage due to eating sweets? What should we do to prevent tooth decay?