Exam Details
| Subject | Electro analytical and Other methods | |
| Paper | ||
| Exam / Course | Post Graduate Diploma in Analytical Chemistry | |
| Department | School of Sciences (SOS) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | December, 2016 | |
| City, State | new delhi, |
Question Paper
No. of Printed Pages: 4 IMCH-0041
P.G. DIPLOMA IN ANALYTICAL CHEMISTRY (PGDAC)
Term-End Examination 00784 December, 2016
MCH-004 :ELECTROANALYTICAL AND OTHER METHODS
Time hours Maximum Marks: 75
Note: Attempt any five questions. All questions carry equal marks.
1. What are the basic laws of electrochemistry Write the units of current, resistance and emf. 5
What is reference electrode Describe the function of silver-silver chloride electrode with a suitable diagram. 5
What are potentiometric titrations Explain with the help of neutralization titration or oxidation-reduction titration. 5
2. Explain the working of glass membrane electrodes with a suitable diagram. 5
Derive an equation for half-life of a radionuclide. If 32p has half-life of 14.2 days, then calculate its A value. 5
What do you mean by conductance Explain the various factors affecting the conductivity of an electrolyte solution. 5
3. What is electrogravimetric analysis Describe constant potential electrolysis briefly. 5
What are conductometric titrations Explain the curves obtained in the titration of a strong acid with a strong base, and a strong acid with a weak base. 5
What is ohmic potential? Determine its units. How is it related to cell potential and applied potential 5
4. Define half-wave potential and discuss the effect of complexing agents on it. What is the nature of a plot between E1/2 and log 5
Distinguish between limiting current and diffusion current. Discuss the effect of the concentration of electrolyte substance on the diffusion current. 5
Explain amperometric titrations. Discuss its any four advantages. 5
5. Write the polarographic equation and explain all the terms. Draw a typical polarogram showing diffusion current, residual current and half-wave potential. 5
What are the different pulse methods in voltammetry Briefly explain anyone method. 5
Explain hydrodynamic voltammetry with a suitable diagram. 5
6. Write down various neutron-induced reactions of 27Al with varying neutron energy. Predict the products formed. 5
Explain the principle of Isotope Dilution Analysis (IDA). What are the conditions that must be fulfilled to carry out IDA procedure? 5
Draw a labelled diagram of a differential thermal analyser and discuss its different components. 5
7. Draw the sketch of the thermogravimetric curve for a mixture of calcium and magnesium carbonates. How will you calculate the mass of Ca and Mg from this curve? 5
Discuss any five instrumental factors affecting thermogravimetric curve. 5
Explain thermometric titration with a suitable example. Draw the sketch of a schematic layout for thermometric titration assembly. 5
8. Write brief notes on any five of the following: 5x3=15
Nature of Neutron to Proton Curve
Cathodic Stripping Voltammetry
Sources of Background Radiation
Polarography
Cyclic Neutron Activation Analysis
Constant Current Coulometry
P.G. DIPLOMA IN ANALYTICAL CHEMISTRY (PGDAC)
Term-End Examination 00784 December, 2016
MCH-004 :ELECTROANALYTICAL AND OTHER METHODS
Time hours Maximum Marks: 75
Note: Attempt any five questions. All questions carry equal marks.
1. What are the basic laws of electrochemistry Write the units of current, resistance and emf. 5
What is reference electrode Describe the function of silver-silver chloride electrode with a suitable diagram. 5
What are potentiometric titrations Explain with the help of neutralization titration or oxidation-reduction titration. 5
2. Explain the working of glass membrane electrodes with a suitable diagram. 5
Derive an equation for half-life of a radionuclide. If 32p has half-life of 14.2 days, then calculate its A value. 5
What do you mean by conductance Explain the various factors affecting the conductivity of an electrolyte solution. 5
3. What is electrogravimetric analysis Describe constant potential electrolysis briefly. 5
What are conductometric titrations Explain the curves obtained in the titration of a strong acid with a strong base, and a strong acid with a weak base. 5
What is ohmic potential? Determine its units. How is it related to cell potential and applied potential 5
4. Define half-wave potential and discuss the effect of complexing agents on it. What is the nature of a plot between E1/2 and log 5
Distinguish between limiting current and diffusion current. Discuss the effect of the concentration of electrolyte substance on the diffusion current. 5
Explain amperometric titrations. Discuss its any four advantages. 5
5. Write the polarographic equation and explain all the terms. Draw a typical polarogram showing diffusion current, residual current and half-wave potential. 5
What are the different pulse methods in voltammetry Briefly explain anyone method. 5
Explain hydrodynamic voltammetry with a suitable diagram. 5
6. Write down various neutron-induced reactions of 27Al with varying neutron energy. Predict the products formed. 5
Explain the principle of Isotope Dilution Analysis (IDA). What are the conditions that must be fulfilled to carry out IDA procedure? 5
Draw a labelled diagram of a differential thermal analyser and discuss its different components. 5
7. Draw the sketch of the thermogravimetric curve for a mixture of calcium and magnesium carbonates. How will you calculate the mass of Ca and Mg from this curve? 5
Discuss any five instrumental factors affecting thermogravimetric curve. 5
Explain thermometric titration with a suitable example. Draw the sketch of a schematic layout for thermometric titration assembly. 5
8. Write brief notes on any five of the following: 5x3=15
Nature of Neutron to Proton Curve
Cathodic Stripping Voltammetry
Sources of Background Radiation
Polarography
Cyclic Neutron Activation Analysis
Constant Current Coulometry
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