North Maharashtra University 2009 B.Sc Chemistry Redox titration - Question Paper

S.Y.B.Sc.-Paper-CH-222
Second Term Q.B. (Analytical Chemistry)

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Redox titration

ques. of 2 marks.

1. describe oxidation.
2. describe Reduction.
3. describe Redox reaction.
4. What is mean by Redox titration .
5. discuss oxidising agent.
6. discuss Reducing agent.
7. Enlist the oxidising agent used in Redox titration.
8. Enlist the Reduction agent used in Redox titration.
9. describe the E.M.F.at equilibrium point during titration of Fe+2 Vs Ce+4.
10. Enlist the various indicator used in Redox titration.
11. Preparation of Iodine solution.
12. Write the balanced reaction of Na2S2O3 & I2
13. describe Redox indicator.
14. Write the formula for potential range for indicator used in Redox titration.
15. Why KI is needed for the preparation of iodine solution? discuss.

ques. of 3 marks.
1. discuss self indicator used in Redox titration.
2. discuss starch indicator used in Redox titration.
3. elaborate the limitation of Iodometric titration.
4. Draw the nature of titration curve in Redox titration.
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5. Why oxidising agents are not directly titrated with sodium thiosulphate.
6. Why Iodometric titration are called indirect titration.
7. explain the standardisation of Na2S2O3.
8. explain the standardisation of KMnO4.
9. elaborate the advantages of Ce+4 ion solution used in Redox titration.
10. discuss Oxidising agents are not directly titrated with sodium thiosulphate
solution.
11. discuss the difficulties in the preparation of KMnO4 solution. How they are
avoided?
12. explain use of Potassium permanganate as oxidizing titrant in redox
titration.
13. describe and discuss the terms -Oxidizing agent, Reducing agent,Redox
titration.
14. Titration ranging from H2AsO3 and I2 is performed by adding NaHCO3 to the
solution of H3AsO3.Explain.

ques. of 4 marks.
1. provide computation of E.M.F. before equivalence point for titration of Fe+2 with
Ce+4 ions.
2. provide computation of E.M.F. after equivalence point for titration of Fe+2 with
Ce+4iions.
3. Write a note on Redox indicator.
4. Write a note on iodometric titration.
5. Write a note on iodimetric titration.
6. Why iodometric titration must be performed in neutral, weakly acidic or
weakly alkaline conditions.
7. Why iodometric titrations usually done in acidic solution and. iodimetric
titrations in neutral solutions ?
8. Distinguish betn iodimetry &iodometry.
9. discuss the principle of iodimetry and iodometry titration.
10. explain the preparation of Ce+4solution elaborate it’s advantages.
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11. How Ce(IV) ion solution is prepared and standardised ? provide its
advantages.
12. explain the reducing agent used in redox titration.
13. provide the criteria of selection of redox indicator .
14. discuss the nature of titration curve involved in Redox titration.
15. How the iodine purified?Explain standardisation of iodine solution.
16. discuss the use of starch in the detection of end point in iodometry
titrations.What precaution are to be taken while using starch indicator.
17. define in brief about Redox indicators used in redox titrations.
18. discuss in brief about the iodometric titration.
19. discuss in brief about Iodimetric titrations. provide their limitations.

ques. of 6 marks.
1. explain the computation of E.M.F.during titration of Fe+2 Vs Ce++..
2. explain various kind of indicator used for detection of end point in redox
titration.
3. explain iodimetric titration.Comment on pH condition & limitation of
iodometric titration.
4. explain iodometric titration discuss determination of dichromate by
useing iodometric titration.
5. discuss the subsequent oxidising agent in brief
a) KMnO4
b) K2Cr2O7
c) Ce+4 in Ceric sulphate.
6. Distinguish ranging from iodometry & iodimetry. discuss iodometric titration’s?
7. Distinguish bet iodimetry & iodometry. discuss iodimetric titration with
suitable example.
8. discuss the principle of iodometry titration.Discuss titration of K2Cr2O7 with
Na2S2O3.Give the quantitative reaction.
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9. discuss the use of subsequent indicator in Redox titrations.
a) Potassium permanganate
b) Starch
c) Diphenyl - amine

Earning:   Approval pending.