$A$ catalyst added to a reaction mixture:

Which statement for the equilibrium constant is true for the reaction $A + B \rightleftharpoons C$?

What is vapour pressure? Explain the statement: "In an open vessel,the rate of vaporization is constant,yet equilibrium is not established."

In the equilibrium $CH_3COOH + H_2O \rightleftharpoons CH_3COO^{-} + H_3O^{+}$,the equilibrium constant may change when:

In a chemical reaction,equilibrium is established when:

One mole of $A_{(g)}$ is heated to $200^{\circ} C$ in a one litre closed flask,until the following equilibrium is reached:
$A_{(g)} \rightleftharpoons B_{(g)}$
The rate of forward reaction at equilibrium is $0.02 \ mol \ L^{-1} \ min^{-1}$. What is the rate (in $mol \ L^{-1} \ min^{-1}$) of the backward reaction at equilibrium?