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JEE Main202431 Jan 2024Evening ShiftChemistryChemical KineticsActual

r = k A for a reaction, 50 % of A is decomposed in 120 minutes. The time taken for 90 % decomposition of A is ______ minutes.

Correct answer

0

Step-by-step solution

r = k A So, order of reaction = 1 t 1 / 2 = 120 min k = 0 . 693 t 1 / 2 For 90 % completion of reaction, ⇒ k = 2 .303 t log a a − x a = 100 , ( a - x ) = 10 By putting the values in above equation, ⇒ 0 .693 t 1 / 2 = 2 .303 t log 100 10 ∴ t = 399 min

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