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COMEDK2016ChemistryChemical Kinetics

A radioactive isotope decays at such a rate that after 192 minutes only 1 16 of the original amount remains. The half-life of the radioactive isotope is

Options

  1. A12 ~min
  2. B24 ~min
  3. C32 ~min
  4. D48 ~min

Correct answer

D. 48 ~min

Step-by-step solution

For radioactive decay t_ 1 / 2 = 0.693 k For concentration to reduce to 1 16 of original amount aligned t &=t_ 1 / 2 4 t_ 1 / 2 &= 192 4 =48 ~min aligned

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