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JEE Main Chemistry question

ChemistryChemical KineticsJEE Main

For a first order reaction, the half-life is 10 mins. How much time in minutes will it take to reduce the concentration of reactant to 25% of its original concentration?

Answer: 20

Solution

Reducing to 25% () of the original is exactly 2 half-lives: .

Question ID VK-144661