Equimolar solutions of A and B are mixed and the reaction is allowed to reach equilibrium. Write down the reactio that correctly describes the relative concentrations at equilibrium?

Complete Question  

Complete Question is attached below

Option A

And

Explanation:

From the question, we are told that:

The Chemical Reaction

Generally, the equation for Equilibrium constant is mathematically given by

Therefore

Hence we conculde

  And

Therefore Option A

the product of the pressure and volume is also constant