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JEE Main Chemistry question

ChemistryChemical KineticsJEE Main

Consider a first order gas phase decomposition reaction given below: . The initial pressure is 6.0 atm. The pressure drops to 3.0 atm after 6.93 min. How much time (in minutes) would it take to lower the partial pressure of by 4.0 atm? [Consider: ]

Answer: 11.05

Solution

Since the pressure of halves (from 6.0 to 3.0 atm) in 6.93 min, , giving . Lowering the partial pressure of by 4.0 atm means

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Question ID VK-144640