Q.

Which is known as crystal carbonate?

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a

Na2CO3

b

Na2CO3.H2O

c

Na2CO3.10H2O

d

None of these

answer is B.

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Detailed Solution

Na2CO3.10H2Owhite crystalline solid→-9H2O<1000CNa2CO3.H2O→-H2O>100oCNa2CO3soda ashSodium carbonate crystallises as sodium carbonate decahydrate on heationg below 100°C, it loses 9 molecules of water of crystalliisation to from monohydrate [Na2CO3.H2O]
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