JEE Main2013ChemistryChemical KineticsActual
The instantaneous rate of disappearance of MnO ₄⁻ ion in the following reaction is 4.56 10⁻³ Ms ⁻¹2 MnO ₄⁻+10 I ⁻+16 H ⁺ 2 Mn ²⁺+5 I ₂+8 H ₂ O The rate of appearance I ₂ is :
Options
- A4.56 10⁻⁴ Ms ⁻¹
- B1.14 10⁻² Ms ⁻¹
- C1.14 10⁻³ Ms ⁻¹
- D5.7 10⁻³ Ms ⁻¹
Correct answer
B. 1.14 10⁻² Ms ⁻¹
Step-by-step solution
Given - d MnO ₄⁻ d t =4.56 10⁻³ Ms ⁻¹ From the reaction given, aligned & - 1 2 dMnO ₄⁻ dt = 4.56 10⁻³ 2 Ms ⁻¹ & - 1 2 d MnO ₄⁻ d t = 1 5 d I ₂ d t & - 5 2 d MnO ₄⁻ d t = d I ₂ d t aligned On substituting the given value d I ₂ d t = 4.56 10⁻³ 5 2 =1.14 10⁻² M / s