CBSE 12 Chemistry · U3
Chemical Kinetics
Rate of a chemical reaction, factors influencing rate, integrated rate equations, temperature dependence of reaction rate, and collision theory. Theory weightage: 7 marks.
Test yourself
A focused, distraction-free run through 25 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic 3.1
Rate of Reaction and Rate Law
Average rate, instantaneous rate, stoichiometric rate expressions and rate law from data.
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Topic 3.2
Factors Affecting Rate, Order and Molecularity
Effect of concentration, catalyst and temperature; order, molecularity and pseudo-first-order conditions.
Topic 3.3
Integrated Rate Equations and Half-Life
Zero-order and first-order integrated equations, diagnostic plots and half-life.
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Topic 3.4
Temperature Dependence and Arrhenius Equation
Arrhenius equation, activation energy, temperature coefficient and catalyst effect on activation energy.
Topic 3.5
Collision Theory and Mechanism-Based Reasoning
Effective collisions, orientation, activation energy, slow step and qualitative mechanism reasoning.