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In Iodometric titration which indicator ...

In Iodometric titration which indicator is used to detect end point of titration reaction?

A

Diphenylamine

B

Starch

C

`MnO_4^⊖`

D

Methyl orange

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The correct Answer is:
B
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Iodine titration can be iodemotric or iodimetric depending on using iodine directly or indirectly is an oxidising agent in the redox titration. a. Iodimetric titration in which a standard iodine solution is used as an oxidant and iodine is directly or indirectly titrated against a reducing agent. For example. 2CuSO_(4)+4KJtoCu_(2)I_(2)+2K_(2)SO_(4)+I_(2) b. Iodimetric procedures are used for the datermination of strength of reducing agent such as thiosulphates, sulphites, arsenties adn stanous chloride etc. by titrating them against standard solution of iodine in a burette. 2Na_(2)SO_(3)to2 NaI +Na_(2)S_(4)O_(6) Starch is used as indicator near the end point whilch form blue colour complex with I_(3)^(-) . The blue colour disappeams when there is not more of free I_(2) . The volume of KI solutioin used for CuSO_(4) will be

Ram can see the purple colour of an acidic indicator below pH=5.5 only and the blue colour only above pH=8.50 .How many times that of acidic form, must the concentration of the basic form at least be for Ram to see the end point of titration of HCl with NaOH ?

The end point of iodometic titrations is detected by adding starch just near end point and not at the beginning of titration. Which statement is not valid for this falt?

The rapid change of pH near the stoichiometric point of an acid-base titration is the basic of indicator detection. pH of the solution is related to the ratio of the concentration of conjugate acid (Hin) and base (In^(-)) forms of the indicator by the expression

Conductance measurements and be used to detect the end point of acid-base titrations. Which of the following plots correctly represents the end point of the titration of strong acid and a strong base?

What are acid -base indicators and how do they indicate the end point of an acid -base titration?

Statement-1:Phenolphathalein can be used as indicator in the titration of weak acid with NaOH. Statement-2 :Near the end point in the titration of weak acid with NaOH, the pH of the solutions is alkaline due to hydrolysis of anion.

What is the role of indicator in titration ?

Assertion : In the iodometric titration, starch is used as an indicator. Reason : Starch is a polysaccharide.

The best indicator for detection of end point in titration of a weak acid and a strong base is

AAKASH INSTITUTE ENGLISH-MOCK TEST 14-Exercise
  1. In the given reaction: P4 + NaOH + H2O rarr PH3 + NaH2PO2

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  2. In the conversion of I2 rarr IO3^-the oxidation state of iodine change...

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  3. The oxidation state of Mn in MnO4^(2-) is

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  4. The oxidation state of phosphorus varies from

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  5. The average oxidation state of sulphur atom in S4O6^(2-) ion is

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  6. Which of the following is not an example of disproportionation reactio...

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  7. For the redox reaction, MnO4^- + C2 O4^(2-) + H^+ rarr Mn^(2+) + CO2 +...

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  8. The equivalent weight ofMnCl2, is half of its molecular weight when it...

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  9. The value of n in the following half equation is MnO4^(-) + 2H2O + ne ...

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  10. The oxidation state of Cr in CrO5 is

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  11. For the galvanic cell: Zn(s) | Zn^(2+)(aq) (1.0 M) || Ni^(2+)(aq) (1.0...

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  12. Which of the following metals will not react dilute hydrochloric acid?

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  13. Syngas is a mixture of

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  14. Zn(s) + Cu^(2+)(aq) rarr Zn^(2+)(aq) + Cu(s) The cell representation f...

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  15. In which of the compounds the oxidation state of hydrogen is -1?

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  16. In Iodometric titration which indicator is used to detect end point of...

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  17. If a small Cu rod is placed in an aqueous solution of ferrous salt, th...

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  18. The standard reduction potential of zinc and silver at 298 K are E((Z...

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  19. The standard electrode potentials of four elements A,B,C,D are - 3.05...

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  20. In faintly alkaline solution, 4 moles of permanganate anion quantitati...

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