Gases show ideal gas behavior at

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high pressure and high temperature

low pressure and high temperature

low pressure and low temperature

high pressure and low temperature

answer is B.

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Detailed Solution

Real gases approach ideal gas behavior at high temperature and low pressure because at high pressures and low temperature, molecules of gases are very close to each other.
Molecular interactions start operating.
Repulsive forces also become significant.
Repulsive interactions are short-range interactions and are significant when molecules are almost in contact and for ideal gas, the assumption is that there are negligible attractive forces between gas molecules.
Real gases show ideal behavior when conditions of temperature and pressure are such that the intermolecular forces are practically negligible.
This can only happen at very low pressure and very high temperature.

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