Question

Under which of the following condition, van der Waals' gas approaches ideal behaviour?

• A. Extremely lower pressure
• B. Low temperature
• C. High pressure
• D. Low product of pV

Hint:

Ideal behaviour is approached at high temperature and low pressure.

Answer 1

The Correct Option is A

Step 1: Underlying Concept:
Real gases behave ideally when intermolecular forces are negligible.
Step 2: Explanation:
At extremely low pressure, volume is large, so molecular volume and intermolecular attractions become negligible. The van der Waals equation reduces to \(PV = RT\).
Step 3: Conclusion:
Extremely lower pressure.