a)Tooth enamel is one of the hardest substance in our body. Explain the
changes in pH of the mouth which indicate tooth decay. How does toothpaste help in preventing it.(b)What is the nature of the salt if the pH of its solution is greater than 7 ?Name the acid and base would be used to prepare the following salts :(i)Potassium sulphate(ii)Ammonium Chloride
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the teeth helps us to chew food,eat the food,etc....it helps to crack the food
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