Q101
General SciencePhysics
At constant temperature, the graph between P (pressure) vs $\frac{1}{V}$ (V=volume) of a real gas is
- a.hyperbola
- b.parabola
- c.circle
- d.straight line
Answer: (D) straight line
By Boyle's law, at constant temperature PV is constant, so P is proportional to $\frac{1}{V}$ and the graph of P against $\frac{1}{V}$ is a straight line through the origin; a real gas follows this closely at low pressure. The hyperbola is the shape of P plotted against V itself, which makes (A) the tempting wrong choice.