Question

Which is valid at absolute zero Temperature ?

• A. KE of the gas becomes zero, but molecular motion does not become zero
• B. KE of the molecules becomes zero and the molecular motion also becomes zero
• C. KE of the gas decreases but does not become zero
• D. None of the above

Answer 1

Answer: (B)

KE of the molecules becomes zero and the molecular motion also becomes zero

As we know,
The translational kinetic energy for one mole of an ideal gas is $\frac{3}{2}RT$.
So at absolute zero kelvin, it becomes zero.
KE of the molecules becomes zero and the molecular motion also becomes zero.