JAMB Chemistry 2021 Objective — Question 10
Question 10 of 41 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2021 Objective paper, with the correct answer and a full explanation.
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The process by which a salt loses its water of crystallisation on exposure to the atmosphere is known as
- A. Hygroscopy
- B. EfflorescenceCorrect
- C. Deliquescence
- D. Efferhexane
Explanation
Efflorescence: loss of water of crystallisation in air (e.g. Na₂CO₃·10H₂O → Na₂CO₃·H₂O). Deliquescence: absorbing moisture until dissolving. Hygroscopy: absorbing moisture without dissolving.
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