applications of reaction quotient and equilibrium constant

A reaction with reaction quotient Qc and equilibrium constant K_(c) , will proceed in the direction of the products when-

At equilibrium the reaction quotient is greater than equilibrium constant.

(i) List the applications of equilibrium constants. (ii) Predict the extent of reaction when the value of equilibrium constant is very high.

If the concentration quotient of a reaction in greater than its equilibrium constant, then the reaction will proceed in the ______ direction.

What is the relation between the equilibrium constant of the forward reaction and the equilibrium constant of the reverse reaction ?