Chemical Kinetics
Rate of a chemical reaction; factors affecting rate of reaction; order and molecularity of a reaction; rate law and rate constant; differential and integral forms of zero and first order reactions; Arrhenius equation; activation energy; collision theory of bimolecular gaseous reactions.
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Take a full mock →Q1 · Chemical Kinetics · EASY
For a first-order reaction, the time required for 75% completion of the reaction is 60 minutes. What is the half-life of this reaction?
Q2 · Chemical Kinetics · MEDIUM
A reaction has a rate constant of 1.5 × 10⁻³ s⁻¹ at 300 K and 6.0 × 10⁻³ s⁻¹ at 320 K. What is the activation energy (Ea) for this reaction? (Given: R = 8.314 J mol⁻¹ K⁻¹, ln 4 = 1.386)
Q3 · Chemical Kinetics · EASY
For a zero-order reaction with initial concentration 0.8 M, the concentration becomes 0.2 M in 30 minutes. How much time (in minutes) will it take for the concentration to reduce from 0.5 M to 0.1 M?
Q4 · Chemical Kinetics · MEDIUM
The rate constant of a reaction increases by a factor of 4 when the temperature is raised from 300 K to 320 K. If the rate constant doubles when temperature increases from 320 K to T K, what is the approximate value of T?
Q5 · Chemical Kinetics · HARD
For a hypothetical reaction 2A + B → products, the following observations were made: (i) Doubling [A] with [B] constant quadruples the rate. (ii) Doubling [B] with [A] constant doubles the rate. (iii) Doubling both [A] and [B] increases the rate 8-fold. What is the overall order of the reaction and the correct rate law?