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NTA Abhyas NEET2020ChemistryChemical KineticsPractice

A substance undergoes first order decomposition involving two parallel first order reactions as : k 1 = 1.25 × 10 - 4 s - 1 k 2 = 3.80 × 10 - 5 s - 1 The mole percentage of B in the products is :

Options

  1. A23.17
  2. B77
  3. C30.16
  4. D69.84

Correct answer

B. 77

Step-by-step solution

mole % o f B = 12.5 × 1 0 - 5 12.5 + 3.8 × 1 0 - 5 × 100 = 12.5 16.3 × 100 = 76.68 %

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