NEB Class 12 Physical Chemistry: Chemical Kinetics, Rate Laws & Arrhenius Equation
Master first-order integrated rate laws, half-life formulas, activation energy calculations, and collision theory for NEB Chemistry.
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Written By: Iris AI Higher Secondary Curriculum Group
Last Updated: Sep 21, 2026
5 min read
Chemical Kinetics provides guaranteed numerical marks in the NEB Class 12 Chemistry paper.
First-Order Integrated Rate Equation
$k = \frac{2.303}{t} \log_{10} \left(\frac{a}{a - x}\right)$ and half-life $t_{1/2} = \frac{0.693}{k}$. Notice that the half-life of a first-order reaction is completely independent of initial reactant concentration.
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