Rate Law and Order of Reaction
Understand how to write the rate law, determine the order of a reaction, and interpret the effect of concentration changes on reaction rate.
Why this shows up in the exam
You will be asked to deduce rate laws and orders from experimental data and to predict how changes in concentration affect the rate.
How NEET tests this
Practise it
These are real questions from past NEET papers that test this exact idea.
For a reaction between A and B the order with respect to A is 2 and the order with respect to B is 3. The concentrations of both A and B are doubled, the rate will increase by a factor of
Push further
More challenging13 harder questions built from the past papers above — a step up in difficulty, with distractors designed so you can't get there by elimination. Written and checked by our reviewers, not from a real paper.
For a hypothetical reaction, 2P + Q → R, the rate law is found to be Rate = k[P][Q]^2. If the concentration of P is doubled and the concentration of Q is halved, what will be the effect on the reaction rate?
More from Chemical Kinetics
First Order Reactions
Master the integrated rate law, half-life, percent completion, and graphical analysis for first order reactions.
Arrhenius Equation and Activation Energy
Understand the Arrhenius equation, how temperature affects rate constants, and how to calculate and interpret activation energy graphically and mathematically.
Rate of Reaction and Stoichiometry
Learn how the rate of a chemical reaction is defined, measured, and related to the stoichiometric coefficients of reactants and products.
Zero Order Reactions
Study the characteristics, integrated rate law, and half-life of zero order reactions, including graphical and mathematical aspects.
Energy Profile Diagrams and Reaction Energetics
Interpret potential energy diagrams for exothermic and endothermic reactions, and relate activation energy to enthalpy changes.
Catalysis and Enzymes
Examine how catalysts, including enzymes, affect reaction rates and activation energy, and their role in biochemical reactions.