Dalton's law of partial pressure is not applicable for which of the following mixtures?

The $O_2$ gas is collected over water at $400 \ K$ temperature in a $2 \ L$ vessel. If the total pressure of the mixture is $33.26 \ bar$ and the pressure of dry $O_2$ gas is $32.20 \ bar$,find the vapour pressure of water under the same conditions.

In a closed vessel at $25 \, ^oC$ temperature,$4 \, mole$ $O_2$,$3 \, mole$ $Cl_2$,and $3 \, mole$ $N_2$ are mixed,and the total pressure is found to be $50 \, bar$. Find the partial pressure of each gas.

Air contains $70\% \, N_2, \, 20\% \, O_2$ and $1\% \, CO_2$ by volume. If the total pressure of air is $1 \, bar$,find the partial pressure of $N_2, O_2$ and $CO_2$.

$A$ gaseous mixture of $3$ gases $A$, $B$ and $C$ has a pressure of $10 \,atm$. The total number of moles is $10$. If the partial pressures of gases $A$ and $B$ are $3 \,atm$ and $1 \,atm$ respectively, and the molar mass of gas $C$ is $2 \,g/mol$, calculate the weight of $C$ in the mixture. (in $\,g$)

Which of the following is zero for an $isochoric$ process?