Gas Laws & Ideal Gas Equation
Which one of the following represents correctly the variation of volume (V) of an ideal gas with temperature under constant pressure conditions?

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Answer: (b)
- Charles's law: at constant , , so .
- The – graph is a straight line of positive slope that passes through the origin when extended.
- Graph Q shows this rising straight line; P falls, R is not a single line, S is constant.
- So the answer is (b) Q.