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JEE Main Chemistry question

ChemistryChemical KineticsJEE Main

For a given reaction of first order, it takes 15 minute for the concentration to drop from 0.8 M litre to 0.4 M litre. The time required for the concentration to drop from 0.1 M litre to 0.025 M litre will be:

Answer: (D)

Solution

The drop from 0.8 to 0.4 M is one half-life, so . The drop from

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Question ID VK-144591