Order And Molecularity
Which of the following statements correctly describes molecularity of a reaction?
Select the correct option:
Solution
Molecularity is the number of reacting species that collide simultaneously in an elementary step
Molecularity is a theoretical concept defined as the total number of molecules, atoms, or ions of reactants involved in an elementary reaction step. It is always a positive integer (1, 2, or rarely 3) and is never zero or fractional. Unlike order of reaction, molecularity cannot be determined experimentally — it is deduced from the proposed reaction mechanism. Order is an experimentally determined quantity and can be zero or fractional.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More order and molecularity Practice Questions
About This Question
- Subject
- chemistry
- Chapter
- chemical kinetics
- Topic
- order and molecularity
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Molecularity is the number of reacting species that collide simultaneously in an elementary step
Molecularity is a theoretical concept defined as the total number of molecules, atoms, or ions of reactants involved in an elementary reaction step. It is always a positive integer (1, 2, or rarely 3) and is never zero or fractional. Unlike order of reaction, molecularity cannot be determined experimentally — it is deduced from the proposed reaction mechanism. Order is an experimentally determined quantity and can be zero or fractional.
This easy difficulty chemistry question is from the chapter chemical kinetics, covering the topic of order and molecularity. It appeared in the 2025 exam.
Looking for more practice? Explore all chemistry questions or browse chemical kinetics questions on RankGuru.