JAMB Chemistry 2025 Objective — Question 2
Question 2 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2025 Objective paper, with the correct answer and a full explanation.
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A sealed bag of potato chips appears inflated when taken from a valley to the top of a high mountain because
- A. The temperature is lower on the mountain, so the gas expands
- B. Lower atmospheric pressure allows the gas inside to occupy a larger volumeCorrect
- C. The number of molecules of the gas increases
- D. The kinetic energy of the gas molecules decreases
Explanation
Air pressure decreases with altitude. At lower external pressure, the gas inside expands to occupy a larger volume per Boyle's Law (constant temperature).
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