Chemistry - Chemical Kinetics Question with Solution | TestHub

ChemistryChemical KineticsSecond & nth Order ReactionsEasy2 minPYQ_2020

ChemistryEasysingle 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 $(n) = \frac{12}{3} = 4$ $(\frac{1}{2})^{n} = \frac{N}{N _{o}} ∴ (\frac{1}{2})^{4} = \frac{3}{N}$ $\frac{3}{N} = \frac{1}{16}$ $N = 48$

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

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...