AIIMS 2017 Chemistry Le Chatelier's Principle Assertion Reason Question
Assertion (A): Adding an inert gas to the dissociation equilibrium of at constant temperature and pressure increases the dissociation.
Reason (R): Due to the addition of the inert gas, the molar concentration of reactants and products decreases.
If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
If Assertion is true but Reason is false.
If both Assertion and Reason are false.
Correct Answer
Detailed Explanation
When an inert gas is added to a reaction at constant pressure and temperature, it increases the total volume without affecting the partial pressures of the reactants and products. According to Le Chatelier's principle, the equilibrium will shift towards the side with more moles of gas to counteract the change, thus validating both the assertion and the reason. Other options are incorrect because they either misinterpret the relationship between the assertion and reason or incorrectly state the validity of one or both statements. Understanding this concept is crucial for predicting the behavior of gas-phase reactions under varying conditions.
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