Chemical Kinetics Question 270

Question: Which of the following reactions is not of the first order-

Options:

A) Inversion of sucrose in the presence of acid

B) Acid-catalyzed hydrolysis of ethyl acetate

C) Hydrolysis of tertiary butyl halide using alkali

D) Oxidation of $ {I^{-}} $ ion by $ S_2O_8^{2-} $ ion

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Answer:

Correct Answer: D

Solution:

[d] It is a second order reaction, first order both w.r.t $ S_2O_8^{2-} $ and $ {I^{-}} $ .
$ \therefore r=k[S_2O_8^{2-}][{I^{-}}] $ All other options are of first order reaction.



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