2019 · Q83
For an ideal gas, which one of the following statements does not hold true?
General KnowledgeChemistry
- AThe speed of all gas molecules is same.
- BThe kinetic energies of all gas molecules are not same.
- CThe potential energy of the gas molecules is zero.
- DThere is no interactive force between the molecules.
Explanation
Kinetic theory holds that gas molecules have a distribution of speeds (the Maxwell-Boltzmann distribution), so their kinetic energies are not all the same. For an ideal gas the intermolecular forces and the potential energy are taken as zero. The statement that all molecules have the same speed is therefore false. Hence option A is correct.