M.Sc. (Semester III) Examination Nov/Dec-2018
Agrochemicals and Pest Management
ANALYSIS OF AGROCHEMICALS
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
All questions carry equal marks.
Q.1 Choose the most correct answer 14
is the unit of Rf value.
cm mm
mm-1 none of these
Which of the following is used in the analysis of SO2
Formaldehyde Acetone
Benzene Alcohol
In paper chromatography is the mobile phase.
Solid Liquid
Gas Water
In fluorescence light is emitted.
Visible UV
IR X ray
Polarogram is a graph of Current versus
Voltage Time
Concentration Speed
Influenza shows type of hazard to our body.
Chemical Psychological
Physical Biological
of the following is IR inactive.
CO NO
HCL CO2
The trans isomer absorbs at wavelength with intensity
than the cis isomer.
Longer, shorter Smaller, shorter
Longer, greater Smaller, greater
How many fundamental vibrations are can be observed in IR spectrum of
water molecule?
5 3
7 2
10) Which of the following shows highest value in PMR spectroscopy?
Ketones Esters
Aldehydes Ethers
11) Benzene shows how many NMR signals?
4 5
1 2
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12) In NMR spectroscopy, the multiplicity of peak due to proton on adjacent
carbon atom is given by rule.
2n+1 n+1
n+2 2n+2
13) In mass spectroscopy the sample to be analysed must be in state.
Liquid Solid
Gaseous Ionic
14) The peak arising due to reactions that occur outside the ionization chamber
but before the magnetic analyser of the mass spectrometer is known as
peak.
Isotope Metastable
Base Molecular ion
Q.2 Answer the following (any four) 08
Write method of analysis of SO2.
Draw neat labelled diagram of G.M. counter.
What type of information is obtained by IR spectroscopy?
Write method of analysis of H2S.
What is the meaning of rule?
Write notes on (any two) 06
Analysis of NOx
Principle of polarography
Mc-Lafferty rearrangement
Q.3 Answer the following (any two) 08
Describe analysis of ammonia by Nessler's method.
Explain residual current and migration current.
Describe finger print region of IR spectroscopy.
Answer the following (any one) 06
Describe construction and working of UV spectrometer.
What are equivalent and non equivalent protons? Explain with example.
Q.4 Answer the following (any two) 10
Write applications of Fluorescence spectroscopy.
Write applications of UV spectroscopy.
Describe various types of ions in mass spectra.
Answer the following (any one) 04
Write applications of HPLC.
Draw and explain PMR spectra of benzoic acid.
Q.5 Answer the following (any two) 14
Explain various types of vibrations in IR spectroscopy.
Write applications of radioisotopes in agriculture.
Describe principle and procedure of thin layer chromatography.