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Estimation of reducing substances by the...

Estimation of reducing substances by the use of standard `I_(2)`,
`I_(2)+2S_(2)O_(3)^(2-)rarr S_(4)O_(6)^(2-)+2I^(Theta)` is called

A

Ioimetry

B

Iodometry

C

Oxidising

D

Reducing

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The correct Answer is:
A
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I_(2)+S_(2)O_(3)^(2-) to

I_(2)+S_(2)O_(3)^(2-) to I^(-)+S_(4)O_(6)^(2-)

Estimation of oxidising substance involving the liberation of I_(2) and subsequent volumetric estimation of I_(2) are refferred to as 2Cu^(2+)+4I^(Theta)rarr Cu_(2)I_(2)+I_(2) I_(2)S_(2)O_(3)^(2-)rarr S_(4)O_(6)^(2-)+2I^(Theta)

(a). IF both (A) and (R) are correct and (R) is the correct explanation of (A). (b). If both (A) and (R) are correct but (R) is not the correct explanation of (A). (c). If (A) is correct, but (R) is incorrect. (d). If (A) is incorrect, but (R) is correct. ltbr. (e) if both (A) and (R) are incorrect. Q. Assertion (A): Estimation of reducing substance by the use of standard I_(2) is called iodometry. Reason (R): in the reaction I_(2)+S_(2)O_(3)^(2-)toS_(4)O_(6)^(2-)+2I^(ɵ) The n factor of S_(2)O_(3)^(2-) is one.

Consider the redox reaction 2S_(2)O_(3)^(2-)+I_(2)rarrS_(4)O_(6)^(2-)+2I^(ө)

CENGAGE CHEMISTRY-P-BLOCK GROUP 17 ELEMENTS - THE HALOGEN FAMILY-Exercises (Single Correct)
  1. Ticture of iodine contains

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  2. In the reaction I(2)+2OH^(Theta)rarr I^(Theta)+IO^(Theta)+H(2)O I(2) i...

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  3. Estimation of reducing substances by the use of standard I(2), I(2)+...

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  4. Estimation of oxidising substance involving the liberation of I(2) and...

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  5. HCI and HF are prepared by heating their salt (NaCI and CaF(2)) with c...

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  6. HBr and HI may be obtained by heating bromide and iodine with syrupy p...

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  7. On passign CI(2) water in a mixture of KBr and KI solution in contact ...

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  8. Which of the following is soluble in water ?

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  9. A greenish yellow gas reacts with an alkin metal hydroxide to form a h...

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  10. When chlorine water is added to an aqueous solution of sodium iodide i...

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  11. For (A)+K(2)CrO(3)+air overset(Heat)rarr(B) (B)+CI(2)rarr(C)pink W...

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  12. Educhlorine is

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  13. Which is incorrectly matched ?

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  14. A certain compound (X) when treated with copper sulphate solution yiel...

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  15. The products of the chemical reaction between Na(2)S(2)O(3), CI(2) and...

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  16. Fluorine on reaction with KIO(3(aq)) gives (A) and on reaction with KH...

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  17. KCIO(3) on reaction with SO(2) gives (A) and on reactionwith conc. H(2...

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  18. Br(2)+underset(HOT)OH^(o+)rarr(A)+(B) (A)+(B)+H^(o+)rarr Br(2) (A)...

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  19. 10 g of bleaching power on reaction with KI required 50 mL of 2N hypo ...

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  20. HCIO(4)+P(2)O(5)rarr(A)+(B) (A) and (B) are

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