Question

The $C{O}_2$ gas does not follow gaseous laws at all ranges of pressure and temperature because :

• A. It is triatomic gas
• B. Its internal energy is quite high
• C. There is attraction between its molecules
• D. It solidity at low temperature

Answer 1

Answer: (C)

There is attraction between its molecules

Real gases do not follow gas laws at all temperature and pressure conditions due to two wrong assumptions in kinetic molecular theory of gases:
(i) The volume occupied by gas molecules is negligible. It is not true because gas molecules do occupy small volume.
(ii) The forces of attraction between gas molecules are zero. It is not true because attractive forces are present between molecules of real gases.