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MHT CET20239 May 2023Morning ShiftChemistryChemical KineticsActual

The rate for reaction A + B product, is 1.8 10⁻² ~mol dm ⁻³ ~s ⁻¹ . Calculate the rate constant if the reaction is second order in A and first order in B .([ A ]=0.2 M ;[ B ]=0.1 M )

Options

  1. A9.0 ~mol ⁻² dm ^6 ~s ⁻¹
  2. B18.0 ~mol ⁻² dm ^6 ~s ⁻¹
  3. C4.5 ~mol ⁻² dm ^6 ~s ⁻¹
  4. D16.0 ~mol ⁻² dm ^6 ~s ⁻¹

Correct answer

C. 4.5 ~mol ⁻² dm ^6 ~s ⁻¹

Step-by-step solution

Rate = k [ A ]^2[ ~B ] aligned k & = rate [ A ]^2[ ~B ] k & = 1.8 10⁻² moldm ⁻⁵ ~s ⁻¹ (0.2 moldm ⁻³ )^2 0.1 moldm ⁻³ & =4.5 ~mol ⁻² dm ^6 ~s ⁻¹ aligned

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