In a reversible reaction,a catalyst:

The yield of product in the reaction $A_{2(g)} + 2B_{(g)} \rightleftharpoons C_{(g)} + Q \ kJ$ would be high at

Le Chatelier's principle is applicable to which of the following?

Which of the following conditions is favorable for the forward reaction in the equilibrium: $H_2 \rightleftharpoons H + H$ $(\Delta H = +ve)$?

On cooling the following system at equilibrium:
$CO_{2(s)} \rightleftharpoons CO_{2(g)}$

In a vessel,the following two systems are in simultaneous equilibrium: $PCl_{5(g)} \rightleftharpoons PCl_{3(g)} + Cl_{2(g)}$ and $COCl_{2(g)} \rightleftharpoons CO_{(g)} + Cl_{2(g)}$. If some $CO$ is added to the vessel at constant volume,then at the new equilibrium: