NEET2009ChemistryChemical KineticsActual
For the reaction, N ₂+3 H ₂ 2 NH ₃ , if d [ NH ₃ ] dt =2 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹ , the value of - d [ H ₂ ] dt would be
Options
- A3 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹
- B4 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹
- C6 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹
- D1 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹
Correct answer
A. 3 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹
Step-by-step solution
Key Idea Rate of disappearance of reactant =- 1 stoichiometry change in conc of reactant time taken coefficient of the reactant Rate of appearance of product change in conc = 1 stoichiometry coefficient of product time taken For the reaction, aligned & N ₂+3 H ₂ 2 NH ₃ & aligned & Rate =- d [ N ₂ ] dt =- 1 3 d [ H ₂ ] dt =+ 1 2 d [ NH ₃ ] dt & or - 1 3 d [ H ₂ ] dt =+ 1 2 d [ NH ₃ ] dt &- d [ H ₂ ] dt = 3 2 2 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹ &=3 10⁻⁴ ~mol ~L ⁻¹ ~s ⁻¹ aligned aligned