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Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsFirst Order ReactionsMedium2 minQB

ChemistryMediumsingle choice

A radioactive substance has 200 nuclei at a given time. The decay constant of the substance is $1 sec^{- 1}$ . In what time will the number of radioactive nuclei become 100 ?

Options:

Answer:

Solution:

$N = N_{0} e^{- λ t}$

$100 = 200 e^{- 1 \times t}$

$\frac{1}{2} = e^{- t}$

$t = ln (2) sec$

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

⏱ 2mℹ️ Source: QB

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