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A substance undergoes first order decomposition. The decomposition follows two parallel first order reactions as:k subscript 1 end subscript equals 1.26 cross times 10 to the power of negative 4 end exponent s e c to the power of negative 1 end exponent and k subscript 2 end subscript equals 3.8 cross times 10 to the power of negative 5 end exponent s e c to the power of negative 1 end exponent The percentage distribution of B and C are:

  1. 80% B and 20% C    
  2. 76.83% B and 23.17% C.    
  3. 90% B and 10% C    
  4. 60% B and 40% C    

The correct answer is: 76.83% B and 23.17% C.

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