M.Sc. (Semester II) (CBCS) Examination Mar/Apr-2018
Agrochemicals and Pest Management
CHEMISTRY OF PESTICIDES AND THEIR FORMULATIONS II
Time: 2½ Hours
Max. Marks: 70
Instructions: All sections are Compulsory. All Question carry equal marks. Attempt any two Questions from Section-II III. Figures to the right indicate full marks.
Section I
Q.1
Select most correct alternative of the following.
14
Methiuron is derivative of
Urea
Thiourea
Malonyl urea
Thiocyanate
Urea derivatives are used as
Herbicides
Rodenticides
Fungicides
Weedicide
Penta chlorophenol on oxidation gives
Hexachloroquinol
Quinol
Chloranil
Hydroxyquinol
Reaction between p chloro thiophenolate with p-chlorobenzyl chloride forms
P fluoroparaside
Mesaltan
Chlorobenside
Pantalan
Name the following pesticide
NO2NO2CHOHCH3CH3
Dinobuton
Dinoseb
P-nitrophenol
Tenuron
Phthalan is obtained by condensation of sodium salt of phthalimide with
Chloral
Chloroform
Carbon tetrachloride
Perchlor
Ester derivative of carbamic acid are known as
Carboxylic acid
Carbamate
Carbolic acid
Carboxylic ester
Name the following pesticide.
OCOCHCH3CH3NHCH3O
Baygon
Carbaryl
Aldicarb
Bendiocarb
Sodium chlorate is used as
Weedicide
Insecticide
Herbicide
Fungicide
10) Thiocarbamates exhibit their pesticidal activity due to release of
CO2
H2S
NH3
NO2
11) Which of the following is correct structure of Ziram?
CH2NHCSMnSCNHCH2SSa)CH2NHCSOSCNHCH2OOb)CH2NHCSZnSCNHCH2SSc)NCSZnSCNSSd)CH3CH3CH3CH3
12) Trade name of endosulfan is
Sevin
Rogar
Thiodan
None of these
13) Azo compounds on reduction forms
Nitro compounds
Amino compounds
Hydrazines
Nitro hydrocarbons
14) Burgundy mixture is mixture of
CuSO4 Na2CO3
CuSO4 Ca
CuSO4 CaCO3
CuSO4 NH4OH
Section II
Attempt any two questions from this section:-
Q.2
Give synthesis of Nitralin and Benifin.
07
Describe the role of Zinc oxide and Zinc phosphate as pest control.
07
Q.3
Give synthesis and uses of Ziram and Zineb.
07
Explain the role of urea derivatives as herbicides. Give synthesis manuron.
07
Q.4
Give synthesis and uses of Baygon and Carbaryl.
07
Give synthesis and uses of Endosulphan and 4 D.
07
Section III
Attempt any two questions from this section:-
Q.5
Describe the role nitro compounds as pest controls.
05
Give synthesis and uses of Menab.
05
Explain the role of copper compounds as fungicide.
04
Q.6
Give synthesis of Dicofol.
05
Explain the structure activity relationship of carbamate with reference to acetyl coline.
05
Describe the use of computer in pesticide analysis.
04
Q.7
Explain the role of hydrogen cyanide and carbon disulphide as fumigants.
05
Give synthesis and uses of Butachlor.
05
Write a note on sulphur fungicides.
04