Answer
Gas molecules are close to each other under high pressure. Due to this, intermolecular forces such as van-der-wall forces (dispersion and dipole dipole moment), hydrogen bonding (in polar gases with Hydrogen), etc develop between gas molecules. These forces makes the gases deviate from the ideal law.
Work Step by Step
Gas molecules are close to each other under high pressure. Due to this, intermolecular forces such as van-der-wall forces (dispersion and dipole dipole moment), hydrogen bonding (in polar gases with Hydrogen), etc develop between gas molecules. These forces makes the gases deviate from the ideal law.