Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsFirst Order ReactionsEasy2 minPYQ_2014

ChemistryEasysingle choice

The half-life period of a first-order reaction is $15 minutes$ . The amount of substance left after one hour will be

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Answer:

Solution:

For the first-order reaction

$A \to Product$

${[A]}_{t} = [A_{0}] {(\frac{1}{2})}^{\frac{Δt}{t_{1 / 2}}}$

$[A]_{t} = [A_{0}] {(\frac{1}{2})}^{\frac{60}{15}} = [A_{0}] {[\frac{1}{2}]}^{4}$

${∴ [A]}_{t} = \frac{[A_{0}]}{16}$

Stream:JEESubject:ChemistryTopic:Chemical KineticsSubtopic:First Order Reactions

⏱ 2mℹ️ Source: PYQ_2014

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