There are four gases H2, He, N2 and CO2 at 0 °C. Which gas shows greater non-ideal behavior?
Correct answer: B. CO2
- A. He
- B. CO2
- C. H2
- D. N2
Explanation
Carbon dioxide is a linear molecule consisting of one carbon atom bonded to two oxygen atoms. CO2 exhibits greater non-ideal behavior compared to helium due to the presence of strong intermolecular forces such as dipole-dipole interactions.
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About Real and Ideal Gases
An ideal gas is modelled as particles with negligible volume and no intermolecular attraction, obeying Boyle's, Charles's and Avogadro's laws through PV = nRT. Real gases deviate from this behaviour, especially at high pressure and low temperature, because particle volume and attractive forces matter; the van der Waals equation explains these corrections.
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