1.

When kept open in air, the crystals of washing soda lose 9 molecules off water to form a monohydrate. Na_(2)CO_(3)*10H_(2)O underset("to air")overset("exposed")toNa_(2)CO_(3)*H_(2)O+9H_(2)O this process is called

Answer»

efflorescence
deliquescence
dehydration
hydration

Answer :A


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