The GATE Grind

GATE Physical Chemistry: Kinetics and Reaction Dynamics: Elementary, parallel, opposing, and consecutive reactions. Steady state approximation. Mechanism of complex reactions. Unimolecular reactions. Potential energy surface and classical trajectories, Concept of saddle points, Transition state theory: Eyring equation, thermodynamic aspects. Kinetics of polymerization. Catalysis concepts and enzyme catalysis. Kinetic isotope effects. Fast reaction kinetics: relaxation and flow methods. Diffusion controlled reactions. Kinetics of unimolecular and bimolecular photophysical processes, Quantum yield calculation, static and dynamic quenching. – Previous Year Questions

6 GATE previous year questions on Kinetics and Reaction Dynamics: Elementary, parallel, opposing, and consecutive reactions. Steady state approximation. Mechanism of complex reactions. Unimolecular reactions. Potential energy surface and classical trajectories, Concept of saddle points, Transition state theory: Eyring equation, thermodynamic aspects. Kinetics of polymerization. Catalysis concepts and enzyme catalysis. Kinetic isotope effects. Fast reaction kinetics: relaxation and flow methods. Diffusion controlled reactions. Kinetics of unimolecular and bimolecular photophysical processes, Quantum yield calculation, static and dynamic quenching. (Physical Chemistry, Chemistry) with answers and explanations, from every paper.

  1. GATE 2026 CY Q20 (1 mark, Multiple choice) – For the reaction shown, if U=5RT/2, the value of H is (X‡ is activated complex; the two deltas are standard activation internal energy and enthalpy; R…
  2. GATE 2026 CY Q46 (2 marks, Multiple choice) – For a reaction between neutral molecules X and Y in a solution at temperature T, the measured rate of reaction is equal to the rate of diffusion.…
  3. GATE 2025 CY Q58 (2 marks, Numerical answer) – An archaeological 14C specimen gives 45 counts per gram of carbon in 5 minutes. Fresh wood gives 20 counts per gram per minute. Background is 5 counts…
  4. GATE 2025 CY Q65 (2 marks, Numerical answer) – The Lineweaver-Burk plot for an enzyme obeying the Michaelis-Menten mechanism is given below. The slope of the line is 0.3610-2 s, and the y-intercept…
  5. GATE 2024 CY Q35 (1 mark, Numerical answer) – Consider the following two parallel irreversible first-order reactions, where k 1=2k 2 at 300 K. After complete conversion of R at 300 K, the…
  6. GATE 2024 CY Q46 (2 marks, Multiple choice) – The correct statement for a thermally initiated radical polymerization in a solution is: (Assume: Steady-state and equal reactivity of the propagating…