Question

(a)At what pH in the mouth is tooth decay faster and why? (1M)

(b)Explain the formation of ionic compound Calcium oxide (CaO) with

electron dot structure. (2M)

(c)We can store copper sulphate solution in a silver vessel but not silver

nitrate solution in a copper vessel. why?​

Answer 1

Answer:

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Answer 2

Answer:

a) at 5pH or below tooth decay starts in mouth bcoz microorganisms in mouth converts sugar into acids which results in decrease of pH in saliva present in mouth.

b) see attachment given...

c) We can store copper sulphate solution in a silver vessel but not silver nitrate solution in a copper vessel. Since copper is more reactive than silver, it will displace silver from its solution and form copper nitrate which will go in solution. Hence we can not store silver nitrate in copper vessel.

hope this will help u...!!!