Question

Which of the following gases deviates most from ideal behavior?

A. S02
B. Ne
C. CH4
D. N2
E. H2

Answer 1

The Kinetic Molecular Theory of Ideal Gases

1. The volume of individual gas molecules is negligible compared to the volume of the container.
2. There are neither attractive nor repulsive forces between gas molecules.
3. Gas molecules have high translational energy, and they move randomly in all directions in straight lines.
4. When gas particles undergo a collision, the collision is elastic (no loss of Ek; frictionless).
5. The average Ek is directly proportional to the temperature.

Gases deviate from ideal behaviour when they disobey the KMT of ideal gases, listed above.

In the given choices, SO₂ would deviate from ideal behaviour. Unlike the other options, it is a polar molecule. Polar molecules tend to form stronger intermolecular bonds. As a result, SO₂ gas would not obey the postulate: There are neither attractive nor repulsive forces between gas molecules.