MHT CET202615 April 2026Morning ShiftChemistryChemical KineticsActual
The rate of the reaction 2A + 3B 2C + D is 6 10⁻⁴ mol dm ⁻³ s ⁻¹ , when [A] = [B] = 0.3 mol dm ⁻³ . If the reaction is of first order for A and zeroth order for B, then find the rate constant.
Options
- A1 10⁻³ s ⁻¹
- B2 10⁻³ s ⁻¹
- C3 10⁻³ s ⁻¹
- D4 10⁻³ s ⁻¹
Correct answer
B. 2 10⁻³ s ⁻¹
Step-by-step solution
The rate law for the given reaction is written as: Rate = k[A]^1[B]^0 Substituting the given values into the rate law equation: 6 10⁻⁴ = k(0.3)^1(0.3)^0 6 10⁻⁴ = k 0.3 k = 6 10⁻⁴ 0.3 k = 2 10⁻³ s ⁻¹ Answer: 2 10⁻³ s ⁻¹