Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas JEE Main2020ChemistryChemical KineticsPractice

For the reaction mechanism of the reaction 2 NO(g) + 2 H 2 (g) → N 2 (g) + 2 H 2 O(g) . Step I 2 NO ⇌ k 1 N 2 O 2 ; K eq fast Step II N 2 O 2 +H 2 → k 2 N 2 O+H 2 O slow Step III N 2 O+H 2 → k 3 N 2 +H 2 O fast Expression of rate of reaction is (Take K eq × k 2 = k')

Options

  1. Ak' [NO] 2 [H 2 ]
  2. Bk' N 2 O 2 [H 2 ]
  3. Ck' N 2 O [H 2 ]
  4. Dk' N 2 O 2

Correct answer

A. k' [NO] 2 [H 2 ]

Step-by-step solution

Step I 2 NO ⇌ k 1 N 2 O 2 ; K eq fast Step II N 2 O 2 + H 2 ⟶ k 2 N 2 O + H 2 O slow Step III N 2 O + H 2 ⟶ k 3 N 2 + H 2 O fast (i) Derive the rate Law Rate = k 2 N 2 O 2 H 2 (Rate determining step) N 2 O 2 NO 2 = K eq ∴ N 2 O 2 = K eq NO 2 Rate = k 2 K eq NO 2 H 2 k' NO 2 H 2 Rate law is third order

Practice Chemical Kinetics on Quantrex Academy →

More from Chemical Kinetics

For a reversible reaction R P , at constant temperature, both the forward and the backward reactions are first order elementary reactions with rate constants k_f and k_b , respecti 2026For a first-order reaction R P at a given temperature, k is the rate constant. For this reaction, at the given temperature, the concentrations of R and P at a time t are [ R ] and 2026Given below are two statements: R=8.314 J K ⁻¹ mol ⁻¹ and 1 cal =4.2 J Statement I: When E_a=12.6 kcal/mol, the room temperature rate constant is doubled by a 10 ,^ C increase in t 2026Decomposition of a hydrocarbon follows the equation k = (5.5 10¹¹ , s ⁻¹) ,e^ -28000 , K T . The activation energy of reaction is __________ kJ mol ⁻¹ . (Nearest Integer) Given : R 2026For a reaction A P at T K , the half life (t_ 1/2 ) is plotted as a function of initial concentration [A]₀ of A as given below. The value of x in the given figure is _______ s (Nea 2026First order gas phase reaction A B + C p_i = initial pressure of gas A, p_t = total pressure of the reaction mixture at time t Expression of rate constant ( k ) is 2026If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99 % of the reaction will be _____ minutes. (Given : 2 = 0.3010 ) 2026Consider the given graph showing variation of reactant concentration with time. Three different reactions were started with identical initial concentration of reactants. Which of t 2026 Full Chemical Kinetics list All NTA Abhyas JEE Main PYQs