Match List I with List II : List I (Order of reaction) List II (Unit of rate constant) A. Zero order I. mol ⁻¹ L s ⁻¹ B. First order II. mol ⁻² L ² s ⁻¹ C. Second order III. s ⁻¹ D. Third order IV. mol L ⁻¹ s ⁻¹ Choose the correct answer from the options given below :

Step-by-step solution

The unit of rate constant k for an n -th order reaction is given by ( mol L ⁻¹)^ 1-n s ⁻¹ . For zero order reaction ( n=0 ): Unit = ( mol L ⁻¹)¹⁻⁰ s ⁻¹ = mol L ⁻¹ s ⁻¹ (Matches A with IV) For first order reaction ( n=1 ): Unit = ( mol L ⁻¹)¹⁻¹ s ⁻¹ = s ⁻¹ (Matches B with III) For second order reaction ( n=2 ): Unit = ( mol L ⁻¹)¹⁻² s ⁻¹ = mol ⁻¹ L s ⁻¹ (Matches C with I) For third order reaction ( n=3 ): Unit = ( mol L ⁻¹)¹⁻³ s ⁻¹ = mol ⁻² L ² s ⁻¹ (Matches D with II) Therefore, the correct matching is A-IV, B-III,