Description
Bachelor’s Degree Programme
(BSCG)
ANALYTICAL METHODS IN CHEMISTRY
ASSIGNMENT
ANALYTICAL METHODS IN CHEMISTRY
Course Code: BCHET-141
Assignment Code: BCHET-141/TMA/2024
Maximum Marks: 100
Note: Attempt all questions. The marks for each question are indicated against it.
Par A (50 marks)
1 Writ the procedure for the collection and preservation of water samples. (5)
2 Define Indeterminate errors. How we can reduce them. (5)
3 What is significance of t-test? Explain using a suitable example. (5)
4 Which reagents are used for extraction by solvation? Give suitable examples. (5)
5 Briefly explain the extraction by chelation. Also give some examples of the chelating
agents used.
(5)
6 Explain continuous extraction with the help of a suitable diagram. Which factors govern
the efficiency of such extractions?
(5)
7 Draw a flow chart for the classification of various types of chromatographic techniques. (5)
8 List different criteria for choosing the mobile phase used in paper chromatography. (5)
9 Discuss the principle of coloumn chromatography illustrating the experimental setup. (5)
10 Briefly explain various types of capacities associated with ion exchangers. (5)
Par B (50 marks)
11 Discuss the factors which limit the accuracy of pH measurements. (5)
12 Discuss design and working of silver-silver chloride electrode. (5)
13 How the conductance is varies with concentration? Explain with the help of
suitable examples.
(5)
14 Explain ionic nobilities and transport number. (5)
15 Taking suitable examples explain the effect of furnace atmosphere on TG curves. (5)
16 An impure sample of CaC2O4 H2O is analyzed using TGA technique. TG curve
of the sample indicates the total mass change from 85 mg to 30.7 mg when this
sample was heated up to 1173 K. calculate the purity of the sample.
(5)
17 Write the shortcomings of wave model of electromagnetic radiation. Describe the
model that was able to explain these shortcomings.
(5)
18 Write the expression of Lambert’s and Beer’s law. List the factors responsible for
the deviation from Beer-Lambert’s law.
(5)
19 What is the necessary condition for observing IR spectrum? Describe in brief the (5)
4
types of vibrations for a polyatomic molecule.
20 How are the signals in an atomic spectrum characterized? Illustrate your answer.
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