Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsZero Order ReactionsMedium2 minPYQ_2013

ChemistryMediumsingle choice

A radioactive isotope having a half - life period of $3$ days was received after $12$ days. If $3 g$ of the isotope is left in the container, what would be the initial mass of the isotope ?

Options:

Answer:

Solution:

Given $t_{1/2} = 3$ Total time $T = 12$ No. of half lives $(n) = \frac{12}{3} = 4$ $(\frac{1}{2})^{n} = \frac{N}{N _{o}}$ $∴ (\frac{1}{2})^{4} = \frac{3}{N _{o}}$ $\frac{3}{N _{o}} = \frac{1}{16}$ $N_{o} = 48 g$

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

⏱ 2mℹ️ Source: PYQ_2013

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