Toothpastes are used to prevent tooth decay because they are _______.

sweet in taste

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acidic in nature

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basic in nature

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neutral in nature

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Solution

The correct option is C basic in nature
Bacteria present in the mouth produces acids by degrading sugar and food particles. Due to the acids produced, the tooth enamel corrodes and the tooth decay starts.

Toothpastes are basic in nature. They neutralise the effect of acids and thus prevent tooth from decaying.

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To prevent tooth decay we are advised to brush our teeth regularly. The nature of the toothpaste commonly used is-

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