When a hydrated chemical loses water of hydration attached to its molecules, the phenomenon is called:

Efflorescence

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Radiation

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Phosphorescence

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Luminescence

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Solution

The correct option is B Efflorescence
Spontaneous loss of water by a hydrated salt which occume when the aqueous vapour pressure of the hydrate is greater than the partial pressure of the water vapour in the air. This process is called Efflorescence

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