Question

# Consider a first order decomposition process A3→32A2 A plot of the concentration of A3 and A2 versus time is shown below. At time , the percentage of the reaction decomposed is

A
75%
B
50%
C
40%
D
30%

Solution

## The correct option is A 40%At time =t [A2]=[A3]  For given reaction               A3→32A2 At t=0   y              0 At t=t   y−x      32x y−x=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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