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In the decomposition of H_{2}O_{2}, evidences suggest following mechanism :

Step (1) H_{2}O_{2}+I^{-}\rightarrow H_{2}O+IO^{-}(Slow)

Step (2) H_{2}O_{2}+IO^{-}\rightarrow H_{2}O+I^{-}+O_{2}

Overall reaction

2H_{2}O_{2}\xrightarrow[Alkaline \; medium]{I^{-}}2H_{2}O+O_{2}

The order of the reaction with respect to H_{2}O_{2} is

 

Option: 1

2


Option: 2

1


Option: 3

Zero

 


Option: 4

3


Answers (1)

best_answer

Answer (2)

Slowest step is the rate determining step.

r=k\left [ H_{2}O_{2} \right ]\left [ I^{-} \right ]

Order of reaction with respect to H_{2}O_{2} is 1

Posted by

Irshad Anwar

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