Rate Law
For a reaction A + 2B → C, the rate law is r = k[A][B]². The order of reaction is:
Select the correct option:
Solution
3
The Overall Order of a chemical reaction is the sum of the powers of the concentrations of the reactants in the experimentally determined rate law.
- Rate Law: r=k[A]1[B]2
- Order with respect to A =1
- Order with respect to B =2
- Overall Order =1+2=3 Note: The stoichiometric coefficients (1 and 2 in the reaction) match the order here, which suggests it might be an elementary reaction, but order must be determined experimentally.
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About This Question
- Subject
- chemistry
- Chapter
- chemical kinetics
- Topic
- rate law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
3
The Overall Order of a chemical reaction is the sum of the powers of the concentrations of the reactants in the experimentally determined rate law.
- Rate Law: r=k[A]1[B]2
- Order with respect to A =1
- Order with respect to B =2
- Overall Order =1+2=3 Note: The stoichiometric coefficients (1 and 2 in the reaction) match the order here, which suggests it might be an elementary reaction, but order must be determined experimentally.
This easy difficulty chemistry question is from the chapter chemical kinetics, covering the topic of rate law. It appeared in the 2025 exam.
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