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JEE Main202325 Jan 2023Morning ShiftChemistryChemical KineticsActual

For the first order reaction A → B the half life is 30 min . The time taken for 75 % completion of the reaction is mm. (Nearest integer) Given : log 2 = 0 . 3010 log 3 = 0 . 4771 log 5 = 0 . 6989

Correct answer

0

Step-by-step solution

t 1 / 2 = T 50 % = 30   min For first order reaction, from the relation between half lives: 2 . 303 t 50 % log 100 50 = 2 . 303 t 75 % log 100 25 T 75 % = 2 t 1 / 2 = 30 × 2 = 60   min

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