The rate constant values for the decay of radioisotopes X and Y , used in radio-medicine are 0.05 ~h^ -1 and 0.025 ~h^ -1 respectively. In a hospital, at a time ' t_0 ' the activity of a sample of X was found to be

Correct answer: B. twice the half-life of X No Solution

Olympiad workbook

Exam: Olympiad workbook
Subject: NSEC
Chapter: Chemical Kinetics

Olympiad workbook · NSEC · Chemical Kinetics

The rate constant values for the decay of radioisotopes X and Y ,...

The rate constant values for the decay of radioisotopes X and Y , used in radio-medicine are

0.05 \mathrm{~h}^{-1}

and

0.025 \mathrm{~h}^{-1}

respectively. In a hospital, at a time '

\mathrm{t}_0

' the activity of a sample of X was found to be twice that of Y . The activities of the two radioisotopes will be approximately equal when the time elapsed is:

Options

Atwice the half-life of Y
Btwice the half-life of X
Cequal to the half-life of X
Dequal to $1 / 2$ the half-life of Y

Correct answer

B. twice the half-life of X

Step-by-step solution

No Solution

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