Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Olympiad workbookNSECChemical Kinetics

Which of the following statement/s is/are correct? I. Half-life is 50 % of the total time taken for the completion of a reaction II. Collision frequency (Z), which is the number of collisions per second per unit volume, is same as the rate constant of the reaction III. A change in the activation energy of a reaction at a particular temperature will result in a proportional change in the rate and rate constant of the

Options

  1. AI , IV
  2. BII only
  3. CIV only
  4. DII, III,V

Correct answer

C. IV only

Step-by-step solution

No Solution

Practice Chemical Kinetics on Quantrex Academy →

More from Chemical Kinetics

For an elementary rearrangement reaction A P , the following data were recorded at 303 K , when [ P ]₀=0 : Set No. [ A ]₀ / mol L ⁻¹ Rate of conversion of A / mol L ⁻¹ ⁻¹ 1 0.340 0The kinetic data recorded at 278 K for the reaction NH ₄ ⁺(a q)+ NO ₂ ⁻(a q) N ₂(g)+2 H ₂ O (I) is Set No. [ NH ₄⁺ ] / M [ NO ₂⁻ ] / M Rate of reaction/ M s-1 1 0.24 0.10 7.2 10⁻⁶ The reaction X + Y Z is first order with respect to X and second order with respect to Y . The initial rate of formation of Z = R mol ⁻ dm ^3 sec ⁻¹ when [ X ]₀ and [ Y ]₀ are 0.40For the reaction 5 Br ⁻( aq )+ BrO ₃⁻( aq )+6 H ⁺( aq ) 3 Br ₂( aq )+3 H ₂ O ( l ) the rate expression was found to be - d [ BrO ₃ ⁻ ] / dt = k [ Br ⁻ ] [ H ⁺ ]^2 [ BrO ₃ ⁻ ] WhichFor the reaction N ₂+3 H ₂ 2 NH ₃ , the rate expression is - d [ NH ₃ ] / dt = k [ H ₂ ] [ N ₂ ] The correct statement is- I. The reaction is not elementary. II. The reaction is ofFor a gaseous reaction, A + B Products, the energy of activation was found to be 2.27 ~kJ ~mol ⁻¹ at 273 K . The ratio of the rate constant (k) to the frequency factor (A) at 273 KA toxic element is to be removed from drinking water by adsorption on activated charcoal. At low concentrations, the rate constant for adsorption is 1.8 10⁻⁵ ~s ⁻¹ . The time requiAbout the energy level diagram given below, which of the following statement/s is/are correct? I. The reaction is of two steps and ' R ' is an intermediate II. The reaction is exot Full Chemical Kinetics list All Olympiad workbook PYQs