MHT CET202313 May 2023Evening ShiftChemistryChemical KineticsActual
For the reaction 2 ~A +2 ~B 2 C + D , the rate law is expressed as rate =k[A]^2[B] . Calculate the rate constant if rate of reaction is 0.24 ~mol dm ⁻³ ~s ⁻¹ . ([ A ]=0.5 M and [ B ]=0.2 M )
Options
- A4.8 ~mol ⁻² dm ^6 ~s ⁻¹
- B9.6 ~mol ⁻² dm ^6 ~s ⁻¹
- C12.1 ~mol ⁻² dm ^6 ~s ⁻¹
- D14.4 ~mol ⁻² dm ^6 ~s ⁻¹
Correct answer
A. 4.8 ~mol ⁻² dm ^6 ~s ⁻¹
Step-by-step solution
Rate =k[A]^2[B] k = Rate [ A ]^2[ ~B ] = 0.24 ~mol dm ⁻³ ~s ⁻¹ (0.5 ~mol dm ⁻³ )^2 (0.2 ~mol dm ⁻³ ) =4.8 ~mol ⁻² dm ^6 ~s ⁻¹