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Chem 408: Analytical Chemistry Ii Question Paper

Chem 408: Analytical Chemistry Ii

Course:Bachelor Of Science

Institution: Catholic University Of Eastern Africa question papers

Exam Year:2015

Cuea/ACD/EXM/AUGUST – DECEMBER 2015/SCIENCE (Chemistry) Page 1
ISO 9001:2008 Certified by the Kenya Bureau of Standards
THE CATHOLIC UNIVERSITY OF EASTERN AFRICA
MAIN EXAMINATION
AUGUST – DECEMBER 2015 TRIMESTER
FACULTY OF SCIENCE
DEPARTMENT OF CHEMISTRY
SCHOOL FOCUSED PROGRAMME
CHEM 408: ANALYTICAL CHEMISTRY II
Date: DECEMBER 2015 Duration: 2 Hours
INSTRUCTIONS: Answer Question ONE and any other TWO Questions
Q1. a) Define the following terms used in instrumental techniques
i Retention time
ii Aspiration
iii Photo electric effect
iv Resolution factor
v Analytical signal (10 marks)
b) Discuss the design of instrument by the mode of timing the beams of light (use only one in each case) (12 marks)
c) List any TWO for each of the following
i Example of photodetector
ii Dispersing elements
iii Ways in which matter interacts with radiation
iv Factors that affect analysis by uv – vis spectroscopy. (8 marks)
Q2. a) Describe how a deuterium lamp can be used to provide a background correction for an atomic absorption spectrum. (2 marks)
b) Write short notes on the following terms
i Releasing agent
P.O. Box 62157
00200 Nairobi - KENYA
Telephone: 891601-6
Fax: 254-20-891084
E-mail:academics@cuea.edu
A. M. E. C. E. A
Cuea/ACD/EXM/AUGUST – DECEMBER 2015/SCIENCE (Chemistry) Page 2
ISO 9001:2008 Certified by the Kenya Bureau of Standards
ii Protective agent
iii Ionization suppressor
iv Atomization
v Pressure broadening
vi Hollow cathode lump (12 marks)
c) Explain the process of atomization in flame emission spectrometry
(6 marks)
Q3. Sketch, clearly label and describe the working of the following devices
i FID (6 marks)
ii Split less injector (8 marks)
iii Interference filter (6 marks)
Q4. a) What are the main differences in instrumental components between the following
i GLC and HPLC
ii Absorption and emission spectroscopy
iii UV – VIS and IR spectroscopy
b) Sketch a print out from chromatography and use arbitrary value to report the number of theoretical plates (any one peak) and the resolution (any two peaks) (10 marks)
c) Name TWO planar techniques. (4 marks)
Q5. Write brief notes on the following
i NMR
ii MS
iii Thermoanalytical techniques
iv Radiochemical
v Electrochemical techniques (20 marks)
*END*

Chem 408: Analytical Chemistry Ii Question Paper

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