AIIMS 2019 Chemistry Zero Order Reactions MCQ Question
Assertion: Some salts are sparingly soluble at room temperature.
Reason: The entropy increases on dissolving the salts.
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
In the decomposition reaction of NH₃, the rate of formation of N₂ is given as k = 2 × 10⁻⁴ mol L⁻¹ s⁻¹, which corresponds to option A. Since the reaction is zero-order, the rate of formation of products is independent of the concentration of reactants, and thus the rate of formation of H₂ is calculated as 3k = 6 × 10⁻⁴ mol L⁻¹ s⁻¹, aligning with option C. Options B and D are incorrect as they do not match the calculated rates for the formation of N₂ and H₂ based on the stoichiometry of the reaction.
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