Consider the given statements regarding the behavior of ideal gases:
1. Ideal gas molecules have negligible volume compared to the total volume of the container.
2. There are strong intermolecular attractive forces between ideal gas molecules.
3. Collisions between ideal gas molecules are perfectly elastic.
Which of the statements given above is/are correct?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e.1 and 3 only.
According to the Kinetic Molecular Theory of Gases, an ideal gas is a theoretical model where molecules are considered point masses with negligible volume compared to the container's total space (Statement 1 is correct). Crucially, it assumes no intermolecular forces of attraction or repulsion between molecules (Statement 2 is incorrect). Furthermore, all collisions—between molecules or with container walls—are perfectly elastic, meaning total kinetic energy is conserved (Statement 3 is correct). Real gases only approximate this behavior at high temperatures and low pressures.