question_answer

For a reversible reaction, if the concentrations of the reactants are doubled, the equilibrium constant will be: [AIPMT 2000]

A)  one-fourth                    

B)  halved

C)  doubled                       

D)  the same

Correct Answer: D

Solution :

Consider a hypothetical change

For this reaction,

For the above reaction if concentration of reactants are doubled than the rate of forward reaction increases for a short time but after sometime equilibrium will established. So, concentration has no effect on equilibrium constant. It remains unchanged after increasing the concentration of reactants.