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Chemical Kinetics question

2009 · Q100
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Chemical Kinetics question

2009 · Q100

NEETChemistryChemical KineticsMCQ+4 / −1
In the reaction,
BrO3(aq)−_{3(aq)}^ -3(aq)−​ + 5Br(aq)−_{(aq)}^ -(aq)−​ + 6H+ →\to→ 3Br2(l) + 3H2O(l).
The rate of appearance of bromine (Br2) is related to rate of disappearance of bromide ions as
  1. A
    d[Br2]dt=−53d[Br−]dt{{d\left[ {B{r_2}} \right]} \over {dt}} = - {5 \over 3}{{d\left[ {B{r^ - }} \right]} \over {dt}}dtd[Br2​]​=−35​dtd[Br−]​
  2. B
    d[Br2]dt=53d[Br−]dt{{d\left[ {B{r_2}} \right]} \over {dt}} = {5 \over 3}{{d\left[ {B{r^ - }} \right]} \over {dt}}dtd[Br2​]​=35​dtd[Br−]​
  3. C
    d[Br2]dt=35d[Br−]dt{{d\left[ {B{r_2}} \right]} \over {dt}} = {3 \over 5}{{d\left[ {B{r^ - }} \right]} \over {dt}}dtd[Br2​]​=53​dtd[Br−]​
  4. D
    d[Br2]dt=−35d[Br−]dt{{d\left[ {B{r_2}} \right]} \over {dt}} = - {3 \over 5}{{d\left[ {B{r^ - }} \right]} \over {dt}}dtd[Br2​]​=−53​dtd[Br−]​
View written solutionFree

Correct answer: D

Rate = 13d[Br2]dt=−15d[Br−]dt{1 \over 3}{{d\left[ {B{r_2}} \right]} \over {dt}} = - {1 \over 5}{{d\left[ {B{r^ - }} \right]} \over {dt}}31​dtd[Br2​]​=−51​dtd[Br−]​



∴\therefore∴ d[Br2]dt=−35d[Br−]dt{{d\left[ {B{r_2}} \right]} \over {dt}} = - {3 \over 5}{{d\left[ {B{r^ - }} \right]} \over {dt}}dtd[Br2​]​=−53​dtd[Br−]​

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