The rate law for the chemical reaction 2NO_2Cl 2NO_2+Cl_2 is rate =k[NO_2Cl]. The rate-determining step is [MP PET 2005]

JEE Main Chemistry question

The rate law for the chemical reaction 2NO_2Cl\rightarrow 2NO_2+Cl_2 is rate . The rate-determining step is [MP PET 2005]

(A)2NO_2Cl\rightarrow 2NO_2+2Cl
(B)NO_2+Cl_2\rightarrow NO_2Cl+Cl
(C)NO_2Cl+Cl\rightarrow NO_2+Cl_2
(D)NO_2Cl\rightarrow NO_2+ClCorrect

Answer: (D)

Solution

The rate law, rate , is first order and involves only one molecule of , so the rate-determining (slowest) step must be a unimolecular step consuming a single molecule. Option (A)

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Question ID VK-144212