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Question

Consider a first order decomposition process A332A2
A plot of the concentration of A3 and A2 versus time is shown below. At time , the percentage of the reaction decomposed is


Your Answer
A
75%
Your Answer
B
50%
Correct Answer
C
40%
Your Answer
D
30%

Solution

The correct option is A 40%
At time =t [A2]=[A3] 
For given reaction
              A332A2
At t=0   y              0
At t=t   yx      32x
yx=32x
[A2]t=0=y=52x
[A2]t=32x
% of decomposition
[A2]t=0[A2]t[A2]t=0×100=40%

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