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Statement The redox titarations in which...

Statement The redox titarations in which liberated `I_(2)` is used as oxidant are called as idometric titration.
Explanation Addition of `KI` to `CuSO_(4)` liberates `I_(2)` which is estimated against hyposolution.

A

`S` is correct but `E` is wrong.

B

`S` is wrong but `E` is correct.

C

Both `S` and `E` are correct and `E` is correct explanation of `S`

D

Both `S` and `E` are correct but `E` is not correct explanation of `S`.

Text Solution

Verified by Experts

The correct Answer is:
C
`{:(2KI+,CuSO_(4),rarr,CuI_(2)+,K_(2)SO_(4),),(,2CuI_(2),rarr,Cu_(2)I_(2)+I_(2),,),(I_(2)+,2Na_(2)S_(2)O_(3),rarr,Na_(2)S_(4)O_(6)+,2Nal,):}`
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Which liberates SO_2 with dil. H_2SO_4 ?

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Statement Iodimetric titrations are redox titrations. Explanation The iodine solution acts as an oxidant to reduce the reductant. I_(2)rarr2erarr2I^(-)

Direct titration of I_(2) with a reducing agent is called iodimetry. If I_(2) is leberated by the oxidation of I_(ɵ) ion by a strong oxidising agent in neutral or acidic medium, the liberated I_(2) is then titrated with reducing agent. Iodometry is used to estimate the strngth of the oxidising agent. For example, in the estimation of Cu^(2+) with S_(2)O_(3)^(2-) Cu^(2+)+I^(ɵ)toCuI_(2)+I_(2) (iodometry) I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(ɵ) (iodimetry) Strach is used as an indicator at the end point, which forms bluecoloured complex with I_(3)^(ɵ) Disappearance of blue colourindicates the end point whe free I_(2) in not present. Q. The volume of KI solution used for CuSO_(4) is:

Direct titration of I_(2) with a reducing agent is called iodimetry. If I_(2) is leberated by the oxidation of I_(ɵ) ion by a strong oxidising agent in neutral or acidic medium, the liberated I_(2) is then titrated with reducing agent. Iodometry is used to estimate the strngth of the oxidising agent. For example, in the estimation of Cu^(2+) with S_(2)O_(3)^(2-) Cu^(2+)+I^(ɵ)toCuI_(2)+I_(2) (iodometry) I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+I^(ɵ) (iodimetry) Strach is used as an indicator at the end point, which forms bluecoloured complex with I_(3)^(ɵ) Disappearance of blue colourindicates the end point whe free I_(2) in not present. Q. In the reaction 2CuSO_(4)+4KItoCu_(2)I_(2)+2K_(2)SO_(4)+I_(2) The equivalent weight of CuSO_(4) is (Mw=159.5g mol^(-1))

A compoud which can be used in space vehicles both to absorb CO_(2) and liberate O_(2) is:

P BAHADUR-REDOX REACTIONS-Exercise(8) Statement:Explanation type problems
  1. Statement Oxidation number of Cu in CuH is -1 Explanation Cu is plac...

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  2. Statement Oxidation state of H is +1 in CuH(2) and -1 in CaH(2) Expl...

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  3. Statement Oxygen atom in both O(2) and O(3) has oxidation number zero....

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  4. Statement N atom has two different oxidation states in NH(4)NO(2). E...

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  5. Statement 2H(2)O(2)rarr2H(2)O+O(2) is autoredox change. Explanation ...

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  6. Statement Oxidation number of metals in metal carbonyls is zero. Exp...

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  7. Statement SO(2) can be used as reductant as well as oxidant. Explanat...

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  8. Statement KMnO(4) is strong oxidant whereas Mn^(2+) is weaker reductan...

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  9. Statement VO(2)^(+) and VO^(2+) both are called vanadyl ions. Explana...

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  10. Statement In the reactions , 3As(2)S(3)rarr28HNO(3)+4H(2)Orarr6H(3)AsO...

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  11. Statement In acidic medium equivalent weight of K(2)Cr(2)O(7) is 49. ...

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  12. Statement Iodimetric titrations are redox titrations. Explanation The...

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  13. Statement The redox titarations in which liberated I(2) is used as oxi...

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  14. Statement KMnO(4) acts as oxidant as well as self indicator in its tit...

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  15. Statement The equivalence point refers the condition where equivalents...

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  16. Statement The equivalence weight of KMnO(4) when it is converted to K(...

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  17. Statement The number of equivalent per mole of H(2)S used in its oxida...

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  18. Statement Starch is generally used as absorption indicator in iodimetr...

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  19. Statement The oxidation number of an element in its free or uncombined...

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