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CHM 101 CHM 101 Past Questions Objective Question
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Question

The thermal decomposition of nitryl chloride, 2NO₂Cl → 2NO₂ + Cl₂, is thought to occur by the following mechanism: NO₂Cl → NO₂ + Cl (slow step), NO₂Cl + Cl → NO₂ + Cl₂ (fast step). What rate law is predicted by this mechanism?
Options
A Rate = k [NO₂Cl]²
B Rate = k [NO₂Cl]
Correct Answer
C Rate = k₁/k₂
D Rate = k[NO₂][Cl]
Correct Answer

Option B is the correct answer.

Detailed Explanation

The slow step (NO₂Cl → NO₂ + Cl) is unimolecular and determines the rate. Rate = k[NO₂Cl].

Hint

The rate law is derived from the reactants in the slow (rate-determining) step.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 1020 of 1872
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