JAMB Mathematics 2022 Objective — Question 17
Question 17 of 41 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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On exposure to the atmosphere, a hydrated salt loses its water of crystallisation to become anhydrous. This phenomenon is called
- A. Hydrolysis
- B. EfflorescenceCorrect
- C. Hygroscopy
- D. Deliquescence
Explanation
Efflorescence is the loss of water of crystallisation when a hydrated salt is exposed to the atmosphere (e.g. Na₂CO₃·10H₂O → Na₂CO₃·H₂O + 9H₂O).
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