Master of Science I (Chemistry)Examination: Oct/Nov 2016
Semester II (New CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SD
170
Thursday
24/11/2016
10.30 AM
to
01.00 PM
Analytical Chemistry II
C
VIII
Instructions: Answer any five questions.
All questions carry equal marks.
Section I is compulsory.
Attempt any two questions from Section II and two from
Section III
Answer to all questions (Section II III) should be written
in one answer book.
Use of log table and calculators in allowed.
Total Marks:70
SECTION I
Q.1 Answer the following: 14
Name the factors affecting chemical shift.
What is the nuclear spin value for C13 nuclei?
Define absorbance.
The most intense peak in the mass is known as
Define coupling constant.
Name the different types of atomizers used in AAS.
What is the function of nebulizer in ICP?
Define spin-spin relaxation.
Which is most abundant peak in alkyl aniline?
Predict the transition involved in methyl chloride.
The dodecane shows the base peak at
Name the factors affecting IR frequencies.
1-Phenyl ethanol shows the base peak at m/z 107 due to
SECTION II
Q.2 Discuss the construction and working of plasma torch. 07
Give the brief account of different types of ions produced in the ion source of
mass spectrophotometer.
07
Q.3 Draw a neat labeled schematic diagram of double beam IR spectrophotometer
and explain its working.
07
Page 1 of 2
Deduce the structure of an organic compound on the basis of following data:
Molecular Formula: C12H16O2
IR: 1740, 1602, 1510, 1170, 760, 690 cm-1
PMR 1.45 1.98 4.1 7.25
Mass 192 119, 77, 43
07
Q.4 Explain the principle and working of NMR spectroscopy. 07
What is the basic principle of AAS? Explain the difference types of
interference in AAS.
07
SECTION III
Q.5 Describe fragmentation pattern of benzyl alcohol. 05
Distinguish between ICP-AE and AAS. 05
Explain TMS is used as internal standard in PMR spectroscopy. 04
Q.6 With the help of Woodward and Fieser's rules calculate the λ max values for
following compounds.
05
Discuss in brief Spin-spin coupling. 05
Explain in brief factor influencing chemical shifts. 04
Q.7 Write a note on any three of the following: 14
Chemical shift
Factors affecting IR frequencies
Various fragmentation mode of diphenyl ether
Qualitative applications of UV-Visible Spectrophotometer