JAMB Physics 2011 Objective — Question 18
Question 18 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.
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If the volume of a gas increases steadily as the temperature decreases at constant pressure, the gas obeys
- A. A. pressure law
- B. B. Charles' lawCorrect
- C. C. Graham's law
- D. D. Boyle's law
Explanation
Charles' law states that the volume of a given mass of gas is directly proportional to its absolute temperature, provided pressure remains constant - so volume decreases (not increases) as temperature decreases. (Note: the question as transcribed appears to contain an inconsistency between the stated relationship and Charles' law; the intended answer per the source key is B.)
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