JEE Main2007ChemistryChemical KineticsActual
Consider the reaction, 2 A + B Products When concentration of B alone was doubled, the half-life did not change. When the concentration of A alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is
Options
- AL ~mol ⁻¹ ~s ⁻¹
- Bno unit
- Cmol ~L ⁻¹ ~s ⁻¹
- Ds ⁻¹
Correct answer
A. L ~mol ⁻¹ ~s ⁻¹
Step-by-step solution
2 A + B Product When conc. of B is doubled, the half life did not change, hence reaction is of first order w.r.t. B . When concentration of A is doubled, reaction rate is doubled, hence reaction is of first order w.r.t. A . Hence over all order of reaction is 1+1=2 So, unit of rate constant mol ⁻¹ ~lit~s ⁻¹ . Hence, (A) is correct.