JAMB Chemistry 2010 Objective — Question 4
Question 4 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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4. The droplets of water observed around a bottle of milk taken out of the refrigerator is due to the fact that A. the saturated vapour pressure of the milk is equal to the atmospheric pressure B. water vapour in the air around the bottle loses some of its energy to the bottle C. water vapour in the air around the bottle gains some energy from the bottle D. the milk is colder than the air
- A. the saturated vapour pressure of the milk is equal to the atmospheric pressure
- B. water vapour in the air around the bottle loses some of its energy to the bottleCorrect
- C. water vapour in the air around the bottle gains some energy from the bottle
- D. the milk is colder than the air
Explanation
Water vapour in the air condenses on the cold bottle because it loses energy (heat) to the cold surface, cooling below its dew point.
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