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Question:

Van der Waal's equation for a gas is stated as, p = nRT/(V-nb) - a(nb)² . This equation reduces to the perfect gas equation, p = nRT/V, when _____________.

temperature is sufficiently low and pressure is high

temperature is sufficiently high and pressure is low

both temperature and pressure are very high

both temperature and pressure are very low

Solution:

At high temperature and low pressure, the volume of atoms and the attractive forces between atoms is assumed to be negligible and Van der Waal's equation gets converted to the ideal gas equation. Option A is correct.