M.Sc. (Semester (CBCS) Examination Oct/Nov-2017
Agrochemicals And Pest Management
CHEMISTRY OF PESTICIDES AND THEIR FORMULATIONS I
Day Date: Thursday, 16-11-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: All questions are compulsory.
Figures to the right indicate full marks.
Attempt any two questions from section-II and Section-III
All questions carry equal marks.
Section I
Q.1 Select most correct alternative of the following (each carry 1 marks) 14
Acylation and alkylation of benzene with acetyl chloride and alkyl halide in
presence of AICI3 is example of
Electrophilic addition Nucleophilic addition
Electrophilic substitution Nucleophilic addition
Which of the following compound undergoes SN2 reaction?
Methyl bromide Isopropyl bromide
Tertiary butyl bromide Ethylene dibromide
Product of Perkins reaction is
Benzoic acid Cinnamic acid
Phthalic acid Salicylic acid
Predict the Product of following reaction.
Ortho and para hydroxy benzoic acid.
Ortho and para hydroxy benzaldehyde
O-hydroxy Phenol
P-hyroxy phenol
Name the following pyrethroid.
Permetherine Cyper metherin
Deltametherin Alethrin
Which of the following compound is best Fumigant?
Methyl bromide Methyl sulphate
Methyl chloride Methyl iodide
Sulphur is formulated in the form of
Dust Granules
Solution Smoke
Name the following pesticide.
Malethion Parathion
Fenitrothion Phorate
Trade name of Monocrotophos is
Rogar Azodrin
Dimecron Thimate
10) Name the following pesticide.
Chloropyriphos Monocrotophos
Quinolphos None of these
11) N-N-dimethyl benzamide is used as
Insect repellent Insect attractant
Insect killer All the above
12) Neem plant extract is used
Fertilizer Insect attractant
Insecticide Insect repellent
13) Name the following reaction.
CHO
con. NaOH
COONa
CH2OH
2
Perkins reaction Knoevenagel reaction
Reformatsky reaction Cannizarro reaction
14) Which compound is used as antioxidant in pyrethrins to improve the
solubility and storage property?
Resorcinol Phenol
Cresol Nitrophenol
Section II
Attempt any two questions from this section:-
Q.2 Discuss Benzoin Condensation reaction with Mechanism. 07
Give synthesis and uses of Malethion and Phosphamidon. 07
Q.3 What are insect attractants and repellents? Describe the mode applications
in plant protection.
07
Discuss Cannizarro reaction with mechanism. 07
Q.4 Give synthesis and uses of Quinolphos and Chloropyriphos. 07
Describe the following pesticide formulations. 07
Wettable powder
ii) Granules.
Section III
Attempt any two questions from this section:-
Q.5 Explain E1-elimination reaction with mechanism. 05
Give synthesis of Deltametherin and Cypermetherine. 05
Write note on Bio-efficiency of Neem preparations. 04
Q.6 Discuss Dinacol-Pinacolone rearrangement reaction with mechanism. 05
Describe the use and environmental fate of Phermones and herbicides. 05
Describe the spray formulation. 04
Q.7 Give synthesis and uses of Dimethoate. 05
Describe the natural and synthetic pyrethroids with their applications. 05
Discuss the reaction of carbonylgroup.