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What is efflorescence? Name one compound which shows efflorescence? support your answer with reaction?

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The processes of loosing water of crystallization, when the substance is exposed to air for long time to form anhydrous or monohydric substance is called as efflorescence.

Na2CO3 10 H2O, Sodium carbonate deca hydrate is one example.

Na2CO3 , 10 H2O -------------->Na2CO3 H2O + 9H2O

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