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JIPMER2011ChemistryChemical Kinetics

2 g of a radioactive sample having half-life of 15 days was synthesised on 1st Jan 2009. The amount of the sample left behind on 1st March, 2009 (including both the days) is

Options

  1. A0 g
  2. B0.125 g
  3. C1 g
  4. D0.5 g

Correct answer

B. 0.125 g

Step-by-step solution

N=N₀ ( 1 2 )^n Given, N₀=2 ~g t_ 1 / 2 =15 days t=60 days n= 60 15 =4 N=2 ( 1 2 )^4 or N=0.125 ~g

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