NEET2018ChemistryStates of MatterActual
The correction factor 'a' to the ideal gas equation corresponds to which of the following?
Options
- AElectric field present between the gas molecules.
- BVolume of the gas molecules.
- CDensity of the gas molecules.
- DForce of attraction between the gas molecules.
Correct answer
D. Force of attraction between the gas molecules.
Step-by-step solution
Vanderwal constant a   ∝ forces of attraction. The constants a and b are called van der Waals constants. They have positive values and are characteristic of the individual gas. If a gas behaves ideally, both a and b are zero, and van der Waals equations approaches the ideal gas law PV=nRT. The constant a provides a correction for the intermolecular forces.