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NEET2016ChemistryChemical KineticsActual

A first order reaction, which is 30 % complete in 30 minutes has a half-life period of

Options

  1. A102.2 ~min
  2. B58.2 ~min
  3. C24.2 ~min
  4. D120.2 ~min

Correct answer

B. 58.2 ~min

Step-by-step solution

For first order reaction, aligned & t= 2.303 k a a-x t_ 30 % t_ 50 % = 2.303 k 100 100-30 2.303 k 100 100-50 & 30 t_ 1 / 2 = 10 7 2 30 t_ 1 / 2 = 0.1549 0.3010 & t_ 1 / 2 = 0.3010 30 0.1549 =58.29 ~min aligned

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