MHT CET202123 Sep 2021Morning ShiftChemistryChemical KineticsActual
For the reaction A + B product, rate of reaction is 3.6 10⁻² mol dm ⁻³ sec ⁻¹ . When [ A ]=0.2 ~mol dm ⁻³ and [ B ]=0.1 ~mol dm ⁻³ , find rate constant of reaction if it is second order with respective to both reactants.
Options
- A18 ~mol ⁻³ dm ^9 sec ⁻¹
- B90 ~mol ⁻³ dm ^9 sec ⁻¹
- C72 ~mol ⁻³ dm ^9 sec ⁻¹
- D36 ~mol ⁻³ dm ^9 sec ⁻¹
Correct answer
B. 90 ~mol ⁻³ dm ^9 sec ⁻¹
Step-by-step solution
Rate law is. aligned & r = K [ A ]^2[ ~B ]^2 & 3.6 10⁻²= k (0.2)^2(0.1)^2 & ~K = 3.6 10⁻² 0.04 0.01 & ~K =90 ~mol ⁻³ dm ^9 sec ⁻¹ aligned