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JEE Main 2024 Chemistry question

ChemistryChemical KineticsJEE Main 2024

Consider the following first order gas phase reaction at constant temperature A(g) → 2B(g) + C(g). If the total pressure of the gases is found to be 200 torr after 23 sec. and 300 torr upon the complete decomposition of A after a very long time, then the rate constant of the given reaction is × 10⁻² s⁻¹ (nearest integer) [Given : log₁₀(2) = 0.301]

Answer: 3

Solution

Let the initial pressure be P₀. At complete decomposition P_∞ = 3P₀ = 300, so P₀ = 100 torr. K = (1/t)ln[(P_∞ −

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Question ID VK-016439