Mark the correct statement in a reversible reaction.

For any reversible reaction,if the concentration of the reactant increases,what is the effect on the equilibrium constant?

Equilibrium is a steady state,but it is dynamic in nature. What is the meaning of this statement?

Predict which of the following reactions will have an appreciable concentration of both reactants and products:
$(a)$ $Cl_{2(g)} \longleftrightarrow 2Cl_{(g)};$ $K_{c}=5 \times 10^{-39}$
$(b)$ $Cl_{2(g)}+2NO_{(g)} \longleftrightarrow 2NOCl_{(g)};$ $K_{c}=3.7 \times 10^{8}$
$(c)$ $Cl_{2(g)}+2NO_{2(g)} \longleftrightarrow 2NO_{2}Cl_{(g)};$ $K_{c}=1.8$

Assertion : The equilibrium constant is fixed and a characteristic for any given chemical reaction at a specified temperature.
Reason : The composition of the final equilibrium mixture at a particular temperature depends upon the starting amount of reactants.

In the chemical reaction ${N_2} + 3{H_2} \rightleftharpoons 2N{H_3}$,at the equilibrium point ...............