Mixing of two different ideal gases under isothermal reversible conditions will lead to:

During winter,when taking a bath,water vapour appears. Explain the physical process.

When a sample of gas is compressed at constant temperature from $15 \, atm$ to $60 \, atm$,its volume changes from $76 \, cm^3$ to $20.5 \, cm^3$. Which of the following statements are possible explanations of this behaviour?
$(1)$ The gas behaves non-ideally
$(2)$ The gas dimerises
$(3)$ The gas is adsorbed into the vessel walls

$0.5 \ mol$ each of $H_2, SO_2$ and $CH_4$ are present in a container. If a hole is made in the container,what will be the order of partial pressures of the gases remaining in the container after $3 \ hours$?

Under the same $P$ and $T$,which of the following pairs of gases will diffuse at the same rate through a small jet?

Select the incorrect statement using the phase diagram of a substance.