CBSE 2026 · Region 4 · Set 1 · Q17 · 2 marks
(a)Reactions of which order will show the rate to be independent of the concentration of the reactant? Give one example of this order.(b)State the condition under which a bimolecular reaction may be kinetically a first order reaction.
(a)
Reactions of which order will show the rate to be independent of the concentration of the reactant? Give one example of this order.
(b)
State the condition under which a bimolecular reaction may be kinetically a first order reaction.
Marking-scheme solution
(a)
Zero order,
Example-Decomposition of gaseous ammonia on a hot platinum surface/
Decomposition of HI on gold surface
(b)
When one of the reactants is in excess.
Chemical KineticsRate of a Chemical ReactionUnderstandvery_short_answermedium
More from Chemical Kinetics
- Assertion: For a zero order reaction the unit of rate constant and rate of reaction are same. Reason (R):…2023 · asked 4×
- Show that the time required for 99.9 % completion in a first order reaction is 10 times of half-life (t 1 /…2024 · asked 3×
- Which of the following curve represents the first order reaction?2026 · asked 3×
- Read the passage given below and answer the questions that follow: The rate law for a chemical reaction…2022 · asked 3×
- The following initial rate data were obtained for the reaction: 2 NO( g)+Br 2( g) → 2 NOBr( g) What is the…2024 · asked 3×
- Answer the following questions (Do any two): Identify the order of reaction from the following unit for its…2022 · asked 3×
- In a reaction, if the concentration of reactant ' X ' is tripled, the rate of reaction becomes twenty-seven…2024 · asked 3×
- The number of molecules that react with each other in an elementary reaction is a measure of the:2025 · asked 3×
CBSE Class 12 Chemistry past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.