Question

When does a gas deviate the most from its ideal behaviour?

• A. At low pressure and low temperature
• B. At low pressure and high temperature
• C. At high pressure and low temperature
• D. At high pressure and high temperature

Answer 1

The correct option is C At high pressure and low temperature

At high pressure and low temperature, gaseous atoms or molecules get closer to each other and van der Waal forces operates. So molecules or atoms start attracting each other. Hence a gas deviate the most from its ideal behaviour. While in ideal behaviour we can consider that gases do not attract each, i.e., there is no intermolecular forces of attraction.