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(i) Write the name given to bases that a...

(i) Write the name given to bases that are highly soluble in water. Give an example.
(ii) How is tooth decay related to pH? How can it be prevented?
(iii) Why does bee-sting cause pain and irritation? Rubbing of baking soda on the sting area gives relief. How?

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i) Alkali, NaOH
ii)Tooth decay starts when the pH of the mouth is lower than 5.5. It can be prevented by using toothpaste which are generally basic.
iii) Bee sting has acid that cause pain and irritation Baking soda being alkaline, Neutralises acid and given relief.
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