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Q.

The instantaneous rate of disappearance of the MnO4− ion in the following reaction is 4.56×10−3 Ms−1. Then the rate of appearance of I2 is: 2MnO4−+10 I−+16H+→2Mn2++5I2+8H2O

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a

1.14×10−3 Ms−1

b

5.7×10−3 Ms−1

c

4.56×10−4 Ms−1

d

1.14×10−2 Ms−1

answer is D.

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Detailed Solution

−d[MnO4−]dt=4.56×10−3 Ms−1−12d[MnO4−]dt=+15d[I2]dtd[I2]dt=52[−d[MnO4−]dt]d[I2]dt=52×4.56×10−3        =1.14×10−2 Ms−1
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