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In this reaction: S(2)O(8)^(2-)+2I^(-) t...

In this reaction: `S_(2)O_(8)^(2-)+2I^(-) to 2SO_(4)^(2-)+I_(2)`

A

oxidation of iodide into iodine takes place

B

reduction of iodine into iodide takes place

C

both oxidation and reduction of iodine takes place

D

None of these

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The correct Answer is:
A
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Explore conceptually related problems

The experiment rate law for the reaction S_(2)O_(8)^(2-)(aq) + 2I^(ɵ)(aq) rarr 2SO_(4)^(2-) (aq) + I_(2)(aq) is k[S_(2)O_(8)^(2-)] [I^(ɵ)] . How would the rate change if (a) Concentration of S_(2)O_(8)^(2-) is halved. (b) Concentration of S_(2)O_(8)^(2-) and I^(ɵ) are halved.

Assertion : In the reactin, 2S_(2)O_(3)^(2-)+I_(2) to S_(4)O_(6)^(2-) + 2I^(-): I_(2) is oxidised. Reason : During oxidation, loss of electron takes place.

In the reaction 2I^(-) + S_(2)O_(8)^(2-) rarr I_(2) + 2SO_(4)^(2-) the catalyst is (A) Fe^(+3) (B) Mn^(+2) (C) Cu^(+2) (D) Ni^(+2)

Knowledge Check

  • In the reaction 2S_(2)O_(3)^(2-)+I_(2)to S_(4)O_(6)^(2-)+2I^(-) the eq. wt of Na_(2)S_(2)O_(3) is equal to its

    A
    mol .wt
    B
    mol.wt/8
    C
    mol. wt/6
    D
    none of these

  • Assertion : In the reactin, 2S_(2)O_(3)^(2-)+I_(2) to S_(4)O_(6)^(2-) + 2I^(-): I_(2) is oxidised. Reason : During oxidation, loss of electron takes place.

    A
    If both Assertion and Reason are correct, and Reason is the correct explanation of Assertion.
    B
    If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
    C
    If Assertion is correct, but Reason is incorrect.
    D
    If Assertion is incorrect, but Reason is correct.

  • The reaction S_(2)O_(8)^(2-) + 3I^(-) rarr 2SO_(4)^(2-) + I_(3)^(-) is of first order both with respect to the persulphate and iodide ions. Taking the initial concentration as 'a' and 'b' respectively and taking x as the concentration of the trioxide at time t a differential rate equation can be written. Two suggested mechanisms for the reaction are: (I) S_(2)O_(8)^(2-)+I^(-) rarr SO_(4)I^(-)+SO_(4)^(2-) (fast) I^(-)+SO_(4)I^(-) overset(k_(1)) rarr I_(2) + SO_(4)^(2-) (slow) I^(-)+I_(2) overset (k_(2)) rarr I_(3)^(-) (fast) (II) S_(2)O_(8)^(2-)+I^(-) overset(k_(1)) rarr S_(2) O_(8) I^(3-) (slow) S_(2)O_(8)I^(3-) overset(k_(2)) rarr 2SO_(4)^(2-) +I^(+) (fast) I^(+)+I^(-) overset (k_(3)) rarr I_(2) (fast) I_(2)+I^(-) overset(k_(4)) rarr I_(3)^(-) (fast) How could the progress of this reaction be best monitored?

    A
    By monitoring the colour of the reaction mixture
    B
    By titration of `I_(3)^(-)` with hypo
    C
    By precipitation of `I^(-)` with `Ag^(+)`
    D
    By monitoring the change in pressure.
    • OP TANDON-OXIDATION AND REDUCTION (REDOX REACTIONS)-Self assignment
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    2. The oxidation state of chromium in chromoium trioxide is:

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    3. For the reaction between KMnO(4) and H(2)O(2). The number of electrons...

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    4. In the ions equatio, BrO(3)^(-) + 6H^(+) + xe^(-) rarr Br^(3+) + 3H(2)...

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    5. In [Cr(O(2))(NH(3))(4)H(2)O]Cl(2) oxidation number of Cr is +3 then ox...

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    6. In the reaction, CrO(5)+SnCl(2) to CrO(4)^(2-) +SnCl(4),the element un...

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    7. Equivalent mass of KMnO(4) in acidic basic and netural are in the rati...

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    8. A compound of Xe and F is found to have 53.5% Xe. What is the oxidatio...

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    9. Peroxide ions are present in

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    10. The metals undergoing disproportion are:

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    11. The non-metals undergoing disportionation are:

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    12. Which of the following can act as oxidising as well as reducing agent?

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    13. The compound that can work both as an oxidising as well as reducing ag...

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    14. The species that contain peroxide ions are:

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    15. Statement-1:Spector ions are the species that are present in the solut...

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    16. Statement-1: Spectator ions are the species that are presetnt in the s...

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    17. Statement-1: Oxidation number of carbon in HCN is +2. Because Stat...

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    18. Statement-I: Bromide ion nets as a reducing agent in the reaction, 2...

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    19. Statement-1: Oxidation number of carbon in HCHO is zero. Because S...

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