Chemical Kinetics
Class 12 Chemistry · Chemistry Part I · Chapter 3
CBSE Class 12 Board Examination community
View all
Chemistry
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Chemistry
Physics, Chemistry, Maths + English
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Mathematics
- Physics
- + 3 more
Physics, Chemistry, Biology + English
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Physics
- Chemistry
- + 3 more
Accountancy, Business Studies, Economics + English
9~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Accountancy
- Business Studies
- + 3 more
Chemistry
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Chemistry
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Physics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Physics
History
3~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- History
Hindi Elective
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- हिंदी
Mathematics
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Mathematics
Sociology
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Sociology
Economics
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Economics
Home Science
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Home Science
Urdu Elective
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- اردو
- Urdu Elective
Geography
3~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Geography
Accountancy
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Accountancy
English Core
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Flamingo
- Vistas
Political Science
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Political Science
Business Studies
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Business Studies
Hindi Core
2~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- हिंदी
Mathematics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (आधार)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Accountancy
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
اردو (اختیاری)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Mathematics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (आधार)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
संस्कृतम् (केन्द्रिकम्)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Physics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (ऐच्छिक)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
संस्कृत (ऐच्छिक)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Physics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
TrendingStart now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (ऐच्छिक)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
اردو (کور)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Urdu Elective
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Computer Science
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Fine Art · Painting
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
TrendingStart now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदुस्तानी संगीत (गायन / वादन)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Biology
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Informatics Practices
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Accountancy
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Biotechnology
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Accountancy
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
सृजनात्मक लेखन और अनुवाद
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Business Studies
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदुस्तानी संगीत (तबला / पखावज)
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Business Studies
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Economics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Economics
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
TrendingStart now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
History
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
History
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
History
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Geography
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Geography
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Geography
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
English Elective · Kaleidoscope
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Political Science
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Political Science
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Sociology
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Sociology
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Psychology
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
English Core · Flamingo
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
English Core · Vistas
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Home Science
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Home Science
~50days leftPre-boards · school dates varyDec 2026 · school-specific · tentative
Start now for December pre-boards. Reuse it for boards.- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Summary
Chemical kinetics deals with the rates of reactions, the factors that control them and the mechanisms by which they occur. The rate of a reaction is the change in concentration of a reactant or product per unit time, expressed as average or instantaneous rate. The rate depends on concentration through the rate law, \(\text{rate}=k[A]^x[B]^y\), where the exponents give the order with respect to each reactant and their sum is the overall order; \(k\) is the rate constant. Order is determined experimentally and may differ from the stoichiometric coefficients, while molecularity refers to the number of species in an elementary step. Integrated rate equations give concentration as a function of time: zero order reactions have rate independent of concentration, and first order reactions follow \(k=\dfrac{2.303}{t}\log\dfrac{[A]_0}{[A]}\) with a constant half-life. Temperature strongly affects rate; the Arrhenius equation \(k=Ae^{-E_a/RT}\) links the rate constant to the activation energy \(E_a\) and temperature. According to collision theory, only molecules colliding with sufficient energy and proper orientation react, and a catalyst speeds up a reaction by providing an alternative path of lower activation energy without being consumed.
Rate of reaction and rate lawOrder and molecularityIntegrated rate equations (zero and first order)Half-life of reactionsTemperature dependence and Arrhenius equationCollision theory and catalysis
Key terms
Rate of reaction
The change in concentration of a reactant or product per unit time.
Rate law
An experimentally determined equation expressing rate in terms of concentrations, \(\text{rate}=k[A]^x[B]^y\).
Order of reaction
The sum of the powers of the concentration terms in the rate law.
Molecularity
The number of reacting species taking part in an elementary reaction step.
Activation energy
The minimum extra energy \(E_a\) reactant molecules must possess to react.
Arrhenius equation
Relates rate constant to temperature, \(k=Ae^{-E_a/RT}\).
Extra questions & answers
Try one from this chapter
The rate of a chemical reaction is defined as: