Master of Science I (Agrochemical and Pest Management)
Examination: Oct Nov 2016 Semester I (New CBCS)
SLR No. Day
Date Time Subject Name Paper No. Seat No.
SLR SP
01
Wednesday
16/11/2016
10.30 AM
to
01.00 PM
Chemistry of Pesticides and
Their Formulation I
C
HCT 1.1
Instructions
All questions carry equal marks.
All Sections are compulsory.
Attempt any two questions from Section II and III
Figures to the right indicates full marks
Total
Marks:70
SECTION I
Q.1 Select most correct alternative from the following (each carry 1 marks) 14
Sulphonation of benzene is example of
Electophilic addition Electrophilic substitution
Nucleophilic addition Nucleophilic substitution
ii) Which of the following compound undergoes SN1 reaction.
iii) The product of knoevenagel reaction is
α hydroxyl ketone hydroxyl aldehyde
α β Unsaturated acid α β Unsaturated ketone
iv) Aromatic aldehydes when undergoes self condensation in presence sodium
or
potassium cyanide give α hydroxy ketone. This reaction is known as
Benzoin condensation Aldol condensation
Derkins condensation Knoevenaged condensation
Delta metherin contains
Chorine Bromine
Iodine Fluorin
vi) Name the following Pyrethroid
Cybermetherin Permethrin
Deltametherin Alethrin
vii) Sulphur is formulated in the form of
Granules Dust
Smoke Solution
viii) The toxicity of pesticide can be graded by
LD 10 LD 40
LD 50 None of these
ix) Azodrin is trade name of
Quinolphos Monocrotophos
Diaziaon Phosalone
What type of ring system is present in Diazinon
Pyrimidine Pyridine
Piperidine Pyrazolone
xi) Wettable powder contains
Diluent Auxiliary Materials
Surface active agents All the above
xii) Phosphamidon is used as used as
Systemic pesticide Non-systemic pesticide
Herbicide Chemosterilant
xiii) Conversion of pinacol to pinacolone is
Addition reaction Elimination reaction
Rearrangement reaction Substitution reaction
xiv) Which of the following compound is used as insect attractant
N N dimethyl
benzamide
N N dimethyl aniline
Aniline Acetamide
SECTION II
Attempt any two questions from this section.
Q.2 What are pesticides? Discuss systemic and non-systemic Pesticides. 07
Discuss knoevenagel reaction with mechanism. 07
Q.3 Give synthesis of Deltamethrin and Cypermetherin, 07
Discuss synthesis and uses of Fenitrothion and Malathion. 07
Q.4 Complete the following reaction. Suggest mechanism and name the reaction.
Describe the following pesticide formulations.
i. Wettable powder
ii. Emusifiable concentrate
07
SECTION III
Attempt any two questions from this section.
Q.5 Discuss SN2 reaction with mechanism and energy profile diagram. 05
What are insect attractant and repellents? Describe their mode of action. 05
Describe the use Neem plant extract for pest control. 04
Q.6 Discuss the synthesis and uses of Chloropyriphos. 05
Complete the reaction and suggest the mechanism.
Give synthesis of Diazinon. 04
Q.7 Discuss the synthesis and uses of Monocrophos and phorate. 05
Discuss Fridel-Craft reaction with mechanism. 05
Explain the aerosols and smoke formulation. 04