What is the difference in the pressure-volume $(P-V)$ graph (at constant $T$) for a real gas and an ideal gas?

  • A
    The real gas curve is always above the ideal gas curve.
  • B
    The real gas curve is always below the ideal gas curve.
  • C
    The real gas curve coincides with the ideal gas curve at all pressures.
  • D
    The real gas curve deviates from the ideal gas curve due to intermolecular forces and molecular volume.

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