Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
BITSAT 2014
Exam
BITSAT
Year
2014
Subject
Chemistry
Chapter
Chemical Kinetics

BITSAT 2014 · Chemistry · Chemical Kinetics

The reduction of peroxydisulphate ion by I ion is expressed by S_ 2...

The reduction of peroxydisulphate ion by I ion is expressed by S2O82−+3\mathrm{S}_{2} \mathrm{O}_{8}^{2-}+3\mathrm{I}−→2SO42−+^{-} \rightarrow 2 \mathrm{SO}_{4}^{2-}+\mathrm{I}3−_{3}^{-}. If rate of disappearance of I−\mathrm{I}^{-} is 9/2×10−3mol9 / 2 \times 10^{-3} \mathrm{ mol} lit ^{-1}\mathrms−1\mathrms^{-1},whatistherateofformationof2SO42−what is the rate of formation of 2 \mathrm{SO}_{4}^{2-} during same time?

Options

  1. A3×10−3molLit−1s−13 \times 10^{-3} \mathrm{ mol} \mathrm{Lit}^{-1} \mathrm{ s}^{-1}
  2. B2×10−3molLit−1s−12 \times 10^{-3} \mathrm{ mol} \mathrm{Lit}^{-1} \mathrm{ s}^{-1}
  3. C10−3molLit−1s−110^{-3} \mathrm{ mol} \mathrm{Lit}^{-1} \mathrm{ s}^{-1}
  4. D4×10−3molLit−1s−14 \times 10^{-3} \mathrm{ mol} \mathrm{Lit}^{-1} \mathrm{ s}^{-1}

Correct answer

A. 3×10−3molLit−1s−13 \times 10^{-3} \mathrm{ mol} \mathrm{Lit}^{-1} \mathrm{ s}^{-1}

Step-by-step solution

\frac{1 d\left[\mathrm{SO}_{4}^{2-}\right]}{2}=\frac{1}{3}\left(-\frac{\mathrm{d}\left(\mathrm{I}^{-}\right)}{d t}\right)\frac{1}{2} \times \frac{d\left[\mathrm{SO}_{4}^{2-}\right]}{d t}=\frac{1}{3} \times \frac{9}{2} \times 10^{-3}\therefore \quad \frac{d\left[\mathrm{SO}_{4}^{2-}\right]}{d t}=3 \times 10^{-3} \mathrm{ mol} \mathrm{Lit}^{-1} \mathrm{ s}^{-1}
Practice Chemical Kinetics on Quantrex Academy →

More from Chemical Kinetics

For the reaction 2 SO_2+O_2 leftharpoons 2 SO_3 , the rate of disappearance of O_2 is 2 ×… BITSAT 2024If for a first order reaction, the value of A and E_a are 4 × 10^ 13 s^ -1 and 98.6 kJ… BITSAT 2024In the chemical reaction A arrow B , what is the order of the reaction? Given that, the… BITSAT 2024Calculate the activation energy of a reaction, whose rate constant doubles on raising the… BITSAT 2024In the reaction, A arrow products, If the concentration of the reactant is doubled rate… BITSAT 2024In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0.4… BITSAT 2024For the decomposition of azomethane, CH_3 N_2 CH_3( g) arrow CH_3 CH_3( g)+N_2( g) a… BITSAT 2023Plots showing the variation of the rate constant (k) with temperature (T) are given… BITSAT 2023 Full Chemical Kinetics list All BITSAT PYQs