M.Sc. (Semester (CBCS) Examination Nov/Dec-2018
Agrochemicals And Pest Management
CHEMISTRY OF PESTICIDES AND THEIR FORMULATIONS I
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Q.1 Select most correct alternative from the following the MCQ. 14
Type of following reaction:-
HNO3
NO2
H2O
H2SO4
50
0
C
Nucleophilic substitution Nucleophilic addition
Electrophilic substitution Electrophilic addition
Intermediate in SN2 is
Transition state Carbocation
Carbanion Carbene
Acylation of Benzene is carried out with
CH3COOH ZnCl2 CH3COCl AlCl3
(CH3CO)2O CH3COONa CH3Cl AlCl3
Which of the following reagent used in Perkins reaction?
CH2(COOC2H5)2 Pyridine Zn CH3COOH
NaCN C2H5OH (CH3CO)2O CH3COONa
Which of following reaction is used for preparation of unsaturated acids?
Cannizaro's reaction Hofmann reaction
Reformatsky reaction Knoevenagel's reaction
Trade name of phorate is
Thimet Azodrin
Rogar Dimecron
Dimethoate is synthesised by condensation of O,O-dimethyl phosphorothioic
acid with
C6H5CONH2 CI CH2 CONH CH3
CH3CONH2 NH2 CO NH2
Name of the following pesticide:-
P
CH3 O
CH S 3O
O
CH COOC2H5
COOC2H5 CH2
Dimethioate Malathion
Diazinon Phosphomidon
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Sulphur is formulated in the form of
Smoke Solution
Dust Granules
10) Basudin is trade of
Chloropyriphos Monocrotophos
Phosalone Diazinon
11) Name the following synthetic pyrethroid
CH C
H
HC CH
C
CH CH3 3
O
C CH O
Br
Br
O C N
Deltamethrin Cypermethrin
Fermethrin Alethrin
12) Condensation of O,O-dimethyl chlorothiophosphate with Na-salt of 4-nitro-
2-methyl phenol in aqueous medium gives
Malathion Fenitrothion
Dimethioate Phosphomidon
13) What is product of following reaction?
Ph-CHO (CH3CO)2O
CH3COONa
180
0
C

COOH
COOH
OH
CH=CH-COOH
COOH
COOH
14) Which of the following compound is used as insect attractant

C
O
N(CH3)2

N
CH3
CH3

NH C CH3
O
NH C NH2
O
Q.2 Answer the following any four:-
1. Predict the product of following reaction
2 CHO
KCN NaCN
C2H5OH

2. What is nitration? Give the reaction of nitration of Benzene.
3. Write the structure and uses of cypermethrin.
08
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4. Name the following pesticide and give its uses.
N
N
S
C2H5 O O
C2H5 O
P
5. Explain in brief use of Neem plant extract in pest control
Write note on any two
1. Friedel Crafts reaction Alkylation
2. Systemic and non-systemic pesticides
3. Formulations of Dusts and Granules
06
Q.3 Answer the following(Any
1. Discuss E2 elimination reaction with mechanism.
2. Give synthesis and uses of chloropyriphos.
3. Explain in brief insect attractants and repellents.
08
Answer the following (Any
1. Discuss Knoerangel's reaction with mechanism.
2. Give synthesis of Quinalphos and Chlorpyriphos.
06
Q.4 Answer the following(Any
1. Discuss the formulation of smoke and emulsifiable concentrate.
2. Complete the following reaction? Suggest mechanism and name it
CHO
2 Con. KOH
and
3. Give synthesis and uses of Diazinon.
10
Answer the following (Any
1. Discuss SN2-reaction with mechanism and energy profile diagram.
2. Give synthesis of Cypermethrin.
04
Q.5 Answer the following(Any 14
Give synthesis and uses of phorate and phosphamidon.
Discuss the Reimer-Tiemann reaction with mechanism.
Describe the formulations of suspension and Aerosols.