A closed tank has two compartments A and B, both filled with oxygen (assumed to be ideal gas). The partition separating the two compartments is fixed and is a perfect heat insulator (Figure). If the old partition is replaced by a new partition which can slide and conduct heat but does not allow the gas to leak across (Figure ), the volume (in ) of the compartment A after the system attains equilibrium is _________.

A closed tank has two compartments A and B , both filled with oxygen (assumed to be ideal gas). The…
Solution
When equilibrium is established, the final and would be the same. Hence, volume ration would be equal to mole ratio.
Asked in: JEE Advanced 2018 (Paper 1)