AIIMS 2019 Chemistry Le Chatelier's Principle MCQ Question
For the endothermic reaction A₂ → 2A, which of the following will increase yield of monomer?
Increase in both temperature and concentration of reactant.
Increase in temperature and decrease in concentration of reactant.
Decrease in temperature and increase in concentration of reactant.
Decrease in both temperature and concentration of reactant.
Correct Answer
Detailed Explanation
Increasing the temperature for the endothermic reaction A₂ → 2A shifts the equilibrium to the right, favoring the formation of monomer A according to Le Chatelier's principle. Additionally, increasing the concentration of reactant A₂ drives the reaction forward, further enhancing the yield of A. In contrast, decreasing the temperature (options C and D) would favor the reactants in an endothermic process, while decreasing the concentration of A₂ (option B) would shift the equilibrium to the left, reducing the yield of A.
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