Chemical Kinetics Question 46
Question: A Substance undergoes first order decomposition. The decomposition follows two parallel first order reactions as The percentage distribution of B and C are [Kerala PMT 2004]
Options:
A) 75% B and 25% C
B) 80% B and 20% C
C) 60% B and 40% C
D) 90% B and 10% C
E) 76.83% B and 23.17% C
Show Answer
Answer:
Correct Answer: E
Solution:
% distribution of $ B=\frac{K_1}{K_1+K_2}\times 100 $
$ =\frac{1.26\times {10^{-4}}}{1.26\times {10^{-4}}+3.8\times {10^{-4}}}\times 100 $
B%=76.83%
$ \text{Distribution of }C=\frac{K_2}{K_1+K_2}\times 100 $
$ =\frac{3.8\times {10^{-4}}}{1.26\times {10^{-4}}+3.8\times {10^{-4}}}\times 100 $
C%=23.17%
