MHT CET202619 April 2026Evening ShiftChemistryChemical KineticsActual
Consider the reaction, 3 I ^-_ (aq) + S ₂ O ₈²⁻ _ (aq) I ₃^- _ (aq) + 2 SO ₄²⁻ _ (aq) If the rate of formation of SO ₄²⁻ at a particular time is 2.2 10⁻² , mol dm ⁻³ , s ⁻¹ . Calculate the rate of consumption of I ^- .
Options
- A1.1 10⁻² , mol dm ⁻³ , s ⁻¹
- B2.2 10⁻² , mol dm ⁻³ , s ⁻¹
- C3.3 10⁻² , mol dm ⁻³ , s ⁻¹
- D4.4 10⁻² , mol dm ⁻³ , s ⁻¹
Correct answer
C. 3.3 10⁻² , mol dm ⁻³ , s ⁻¹
Step-by-step solution
The rate of reaction is given by: Rate = - 1 3 d[ I ^-] dt = 1 2 d[ SO ₄²⁻] dt The rate of consumption of I ^- is - d[ I ^-] dt . - d[ I ^-] dt = 3 2 d[ SO ₄²⁻] dt Substituting the given rate of formation of SO ₄²⁻ : - d[ I ^-] dt = 3 2 2.2 10⁻² - d[ I ^-] dt = 3.3 10⁻² mol dm ⁻³ s ⁻¹ Answer: 3.3 10⁻² , mol dm ⁻³ , s ⁻¹