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KCET2009ChemistryChemical 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

array llrl N = N ₀ ( 1 2 )^ n & & Given, & N ₀ =2 ~g t _ 1 / 2 =15 days & T =60 days & n = 60 15 =4 & ~N =2 ( 1 2 )⁴ or & N =0.125 ~g array

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