Le Chatelier's principle is not applicable to:

In which of the following equilibrium systems is the rate of the backward reaction favoured by an increase of pressure?

For the reaction $2A_{(g)} + B_{(g)} \rightleftharpoons C_{(g)} + 362 \, kcal$,which combination of pressure and temperature will favor the formation of $C$ at equilibrium?

Two systems $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$ and $COCl_{2(g)} \rightleftharpoons CO_{(g)} + Cl_{2(g)}$ are in equilibrium simultaneously in a container of constant volume. If some $CO_{(g)}$ is added to the container at constant volume,then at the new equilibrium:

For the chemical reaction $3X_{(g)} + Y_{(g)} \to X_3Y_{(g)}$,the amount of $X_3Y$ at equilibrium is affected by

The reaction $A + B \rightleftharpoons C + D + \text{heat}$ has reached equilibrium. The reaction may be made to proceed forward by: