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Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsSecond & nth Order ReactionsEasy2 minPYQ_2020

ChemistryEasysingle choice

A first order reaction has a rate constant $0.00813 min^{- 1}$ . How long will it take for $60%$ completion?

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Answer:

Solution:

(A) Original amount of reactant $= 100$ $[A]_{t} =$ Reactant remaining unreacted $= 100 - 60 = 40$ For first order reaction, $∴ t = \frac{2.303}{0.00813 min ^{- 1}} lo g_{10} \frac{100}{40} = 112.7 min$

Stream:MHT_CETSubject:ChemistryTopic:Chemical KineticsSubtopic:Second & nth Order Reactions

⏱ 2mℹ️ Source: PYQ_2020

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