Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202617 April 2026Evening ShiftChemistryChemical KineticsActual

Which of the following is an example of second order reaction ?

Options

  1. A2 , H ₂ O _ 2(l) 2 H ₂ O _ (l) + O _ 2(g)
  2. BCH ₃ CHO _ (g) CH _ 4(g) + CO _ (g)
  3. C2 , NO _ 2(g) + F _ 2(g) 2 NO ₂ F _ (g)
  4. D2 , NO _ (g) + 2 H _ 2(g) N _ 2(g) + 2 H ₂ O _ (l)

Correct answer

C. 2 , NO _ 2(g) + F _ 2(g) 2 NO ₂ F _ (g)

Step-by-step solution

The order of a reaction is determined experimentally by its rate law. For the decomposition of hydrogen peroxide, the rate law is Rate = k[ H ₂ O ₂] . It is a first-order reaction. For the thermal decomposition of acetaldehyde, the rate law is Rate = k[ CH ₃ CHO ]^ 1.5 . It is a fractional-order (1.5) reaction. For the reaction between NO ₂ and F ₂ , the mechanism involves a slow rate-determining step: NO ₂ + F ₂ NO ₂ F + F . The rate law is Rate = k[ NO ₂][ F ₂] . The overall order is 1 + 1 = 2 , making it a secon

Practice Chemical Kinetics on Quantrex Academy →

More from Chemical Kinetics

When the concentration of the reactant in a given reaction is halved and if the rate of reaction is halved, the order of the reaction is: 2026A first order reaction is 50%complete in 30 minutes at 300 K and in 10 minutes at 320 K. The activation energy of the reaction (E_a ) is: [R=8.314 J K ⁻¹ mol ⁻¹ ; log 2 = 0.3010; l 2026In the synthesis of NH₃ from H₂ and N₂ , if 6 10⁻² mole of hydrogen disappears in 10 minutes, the number of moles of NH₃ formed in 0.3 minutes is: 2026The initial pressure of the system before decomposition for a first order gas phase reaction A_ (g) B_ (g) + C_ (g) was P_i . After lapse of time 't', total pressure of the system 2026Which of the following factors is altered by the addition of a catalyst during a chemical reaction? 2026The rate constants for two different reactions, k₁ and k₂ are 10¹⁶ e^ -2000/T and 10¹⁵ e^ -1000/T respectively. The temperature at which k₁ = k₂ is 202660% of a first order reaction was completed in 60 min, then 50% of the same reaction can be completed in: [log 4 = 0.60, log 5=0.69] 2026Identify the correct values to be plotted in the graph, the slope of which can be used to determine the activation energy of a reaction. 2026 Full Chemical Kinetics list All MHT CET PYQs