According to Charles's law, the graph drawn between the temperature and volume of a gas at constant pressure is a .
A
straight line
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B
hyperbola
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C
parabola
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Solution
The correct option is A straight line Charles' law states that at constant pressure, the volume occupied by a gas is directly proportional to the temperature.
On increasing the temperature the gas molecules start moving more rapidly. As particles move away from each other, the volume of the gas tends to increase on increasing the temperature and vice versa.
Hence, the graph drawn between temperature and volume of a gas at a constant pressure gives a straight line.