M.Sc. (Semester III) (CBCS) Examination Mar/Apr-2018
Analytical Chemistry
INSTRUMENTAL METHODS OF ANALYSIS I
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt in all five questions. Section I is compulsory. Attempt any two questions from Section II and any two questions from Section III. Answer to all questions (Section II and III) should be written in the one answer book. All question carry equal marks. Figures to the right indicate full marks. Use of log table and calculator is allowed.
Section I
Q.1
Answer the following.
14
Give the expression for Ilkovic equation.
Mention various micro electrodes that are used in voltammetric study.
What is the effect of radiofrequency on the molecules?
What is the principle underlying amperometric titration?
What are nuclear radiations?
is the unit of radioactivity.
Illustrate graphically the endotherm and exotherm.
Give the basis of high frequency titration method.
Who developed the isotopic dilution analysis a quantitative analytical technique?
With sketch of typical polarogram, show various current regions.
Give the basic principle of DSC technique.
In thermogravimetric analysis mass change versus temperature or time is plotted. [True or False]
Give examples of biocatalytic membrane electrodes.
Who introduced the technique of high frequency analysis?
Section II
Q.2
What do you mean by radio-isotopes? Discuss the applications of radio-isotopes in health care.
07
Describe with principle, construction and working of glass electrode.
07
Q.3
Explain how voltammetry technique is useful in determination of organic species.
07
Discuss the forensic applications of neutron activation analysis.
07
Q.4
Sketch typical DTA curve for hypothetical substance and illustrate the terms endotherm and exotherm.
07
Explain the factors that affects the shape of the TGA peaks
07
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SLR-UF-230
Section III
Q.5
Advantages and disadvantages of electrogravimetry.
05
Write on voltammetry with a rotated electrode.
05
Explain biamperometric titration.
04
Q.6
Illustrate typical thermogravimetric analyzer.
05
Explain how electrolytic separation of metals can be done.
05
Differentiate between the constant current and constant potential coulometry.
04
Q.7
Write a note on any Three of the following.
14
Typical DSC cell
Advantages of conductometric high frequency methods
Characteristics of nuclear radiations
Interaction of nuclear radiation with matter