M.Sc. (Part – I) (Semester – II),Solapur University Question Paper,(CGPA Pattern) Paper – VI : Analytical Techniques for Agrochemicals,2014 Question Paper

Solapur University Question Paper
M.Sc. (Part – I) (Semester – II) Examination, 2014
AGROCHEMICALS AND PEST MANAGEMENT (CGPA Pattern)
Paper – VI : Analytical Techniques for Agrochemicals
Day and Date : Thursday, 24-4-2014 Total Marks : 70
Time : 11.00 a.m. to 2.00 p.m.
Instructions :1) All questions are compulsory.
2) Attempt any two questions from Section II and III.
3) Figures to right indicate full marks.
4) Neat and labelled diagrams should be drawn.
SECTION – I
1. Choose the most correct alternative and write the sentence : 14
i) Sub sample is obtained after some treatment like _______________
a) Reduction in particle size b) Oxidation
c) Increase in particle size d) Increase in concentration
ii) A polymer containing _______________ group acts as a cationic resin.
a) Phenolic b) Primary amine
c) Secondary amine d) Tertiary amine
iii) The fundamental requirement of an ion exchange resin is that it must be
_______________
a) Soluble in water b) Hydrophobic
c) Unstable d) Denser than water
iv) The pH range of methyl orange indicator is _______________
a) 7 – 10 b) 4 – 7 c) 3.1 – 4.4 d) 7.3 – 9.5
v) In gravimetric estimation of iron, ammonium _______________ reagent is
used.
a) Fluoride b) Iodide c) Hydroxide d) Nitrate
P.T.O.
SLR-VP – 6 -2-
vi) In gravimetric estimation of aluminium which reagent is used ?
a) Ammonia b) HCl
c) 8 – hydroxyquinoline d) Thiocyanate
vii) In gravimetric estimation of copper which reagent is used ?
a) Ammonium b) HCl
c) 8 – hydroxyquinoline d) Thiocyanate
viii) The conductance of an electrolyte solution is 1.0 × 10– 3 mhos. If the cell
constant is 0.5 its specific conductance _______________ its conductance.
a) Equal to b) Half of c) One fourth d) One tenth
ix) Quinhydrone is used in _______________ titration.
a) complexometric b) potentiometric
c) pH metric d) conductometric
x) The increase in conductance as the acetic acid titrated against NaOH is due
to replacement of H+
 by _______________ ions.
a) Cl–
b) CH3COO–
c) Na+ d) OH–
xi) Which is the second step of stripping analysis ?
a) Concentration b) Stripping c) Reduction d) Deposition
xii) In polarimetry the _______________ of the rotation of a plane polarized light
is measured.
a) Intensity b) Transmission
c) Angle d) Direction
xiii) In _______________ the difference in temperature is measured as a function
of either time or temperature.
a) AAS b) Flame photometry
c) DTA d) Voltammetry
xiv) To measure temperature in thermal analysis _______________ is used.
a) Thermometer b) Manometer
c) Thermocouple d) Furnace
-3- SLR-VP – 6
SECTION – II
2. a) During solvent extraction of a metal as a complex discuss the various features
of a ligand. 7
b) Discuss the procedure of sample application and plate development of thin
layer chromatography. 7
3. a) Describe the determination of aluminium using EDTA by back titration method. 7
b) Describe the method of determining sulphate. 7
4. a) Describe the detailed procedure of striping voltametry using hanging mercury
drop electrode. 7
b) Describe the anodic stripping voltametric method of determining lead in tap
water. 7
SECTION – III
5. a) Describe with neat sketch the construction and working of pre-mix burner
used in atomic absorption spectrophotometer. 5
b) Describe the flame photometric method of determining alkali metals. 5
c) Write short note on TGA. 4
6. a) Describe the procedure for polarimetric analysis of pesticides. 5
b) Give an account of experimental details of DTA. 5
c) Write short note on AAS analysis of food. 4
7. a) Describe in detail ion chromatography. 5
b) What are metallochromic indicators ? Discuss in detail. 5
c) How would you do the conductometric estimation of halides ? Describe in
detail. 4
_____________

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