NEET2017Chemistry-Chemical Kinetics
NEET 2017 Chemistry Reaction Mechanisms MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Mechanism of a hypothetical reaction X₂ + Y₂ ⟶ 2XY is given below:
(i) X₂ ⟶ X + X ... fast (ii) X + Y₂ ⟶ XY + Y ... slow (iii) X + Y ⟶ XY ... fast
The overall order of the reaction will be ______.
A
0
B
1
C
1.5
D
2
Correct Answer
Option C
Detailed Explanation
The rate-determining step is the slowest step (ii), which involves one molecule each of X and Y₂, making the reaction first order overall.
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