M.Sc. (Semester II) (CBCS) Examination Oct/Nov-2017
Agrochemicals and Pest Management
ANALYTICAL TECHNIQUES FOR AGROCHEMICALS
Day Date: Monday, 20-11-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: All Questions are Compulsory.
All Question carry equal marks.
Solve any two Questions from Section-II
Solve any two Questions from Section-III
SECTION I
Q.1 Choose the most correct answer (one mark 14
In a conductivity cell plates are used as a electrode.
Copper Aluminium
Zinc Platinum
In potentiometric titration the potential of indicator electrode depends on the
of ions present in the solution.
Pressure Temperature
Volume Concentration
SI unit of conductance is
Siemen ohm
ohm-1 mhos
Which is the second step of stripping analysis?
Concentration Stripping
Oxidation Dissolution
Anion exchange chromatography is used for separation of
Both cations and anions Cations only
Anions only Neutral species
In adsorption column chromatography technique the distribution of solution
occurs between
Two liquid phases
Two solid phases on the column
Solute and solvent phases
A solid and liquid phase on the column
The liquid-liquid chromatography is known as chromatography.
Gas liquid Adsorption
Absorption Partition
In Acid-base titration which indicator is used?
Phenolphthalein Eriochrome Black-T
Methyl red Xylenol orange
Methyl red is in acid solution.
Red Yellow
Orange Pink
10) In Gravimetric estimation iron is precipitated as
Iron powder Iron hydroxide
Iron chloride Iron sulphate
11) The flame photometer is used for analysis of metals.
Qualitative Quantitative
Qualitative and Quantitative None of these
12) In flame photometry light is measured.
Absorbed Emitted
Transmitted Reflected
13) In photomultiplier tubes is present.
Photocathode Photoanode
Photon None of these
14) Quinhydrone is mixture of quinone hydroquinone.
1:2 1:1
2:3 3:5
SECTION II
Q.2 Describe principle, procedure and types of paper chromatography. 07
What is acid base titration? Describe different curves involved in acid base
titration.
07
Q.3 Draw the circuit diagram of PH meter and explain its working. Write the
methods of calibration of PH meter.
07
Define redox titration. Explain different types of redox titration. 07
Q.4 What are ion exchangers? Write principle, types and applications of ion
exchange chromatography.
07
Write principle and working of flame photometer. 07
SECTION III
Q.5 Describe metallochromic indicators. 05
Write method of determination of salinity of soil by conductometer. 05
Write application of voltametry in trace analysis. 04
Q.6 What is chromatography? Write classification of chromatography with
principle of each class.
05
Describe principle and applications of polarimeter in optically active pesticide analysis.
05
Describe principle applications of Nephelometer. 04
Q.7 Describe construction uses of salt bridge. 05
Write application atomic absorption spectroscopy. 05
Write a note on gravimetric estimation of 04