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The substance undergoes first order decomposition. The decomposition follows two parallel first order
\( \mathrm{P} \) reactions as :

W)
\[
\mathrm{K}_{1}=1.26 \times 10^{-4} \mathrm{sec}^{-1} \text { and } \mathrm{K}_{2}=3.8 \times 10^{-5} \mathrm{sec}^{-1}
\]
The percentage distribution of \( \mathrm{B} \) and \( \mathrm{C} \)
(1) \( 80 \% \mathrm{~B} \) and \( 20 \% \mathrm{C} \)
(2) \( 76.83 \% \mathrm{~B} \) and \( 23.17 \% \mathrm{C} \)
(3) \( 90 \% \mathrm{~B} \) and \( 10 \% \mathrm{C} \)
(4) \( 60 \% \mathrm{~B} \) and \( 40 \% \mathrm{C} \)
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