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JEE Main201912 Jan 2019Morning ShiftChemistryChemical KineticsActual

Decomposition of X exhibits a rate constant of 0 .05   μg / year . How many years are required for the decomposition of 5   μg of X into 2 .5   μg ?

Options

  1. A20
  2. B4 0
  3. C25
  4. D50

Correct answer

D. 50

Step-by-step solution

According to unit of rate constant, it is a zero order reaction. Then, half life of reaction will be: t 1 2 = C 0 2 k = 5 μ g 2 × 0.05 μ g / y e a r = 50  y e a r

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