AIIMS 2018 Chemistry Equilibrium Concentrations MCQ Question

To find the equilibrium concentration of I₂ (denoted as x), we start with the initial concentration of ICl at 0.6 M. The stoichiometry of the reaction shows that for every 2 moles of ICl that react, 1 mole of I₂ is produced. Thus, at equilibrium, the concentration of I₂ is given by x = (0.6 - 2x)/2. Solving this equation leads to x = 0.256 M, confirming option B as the correct answer. Other options are incorrect because they do not satisfy the stoichiometric relationship or the equilibrium condition derived from the initial concentrations.