University of Delhi 2010-1st Year B.Sc PMCS (Physics, Mathematics, Computer Science) Prog 3rd NSECTICIDE PESTICIDE FORMULATION ANALYSIS QUALITY CONTROL UNIVERSITY - Question Paper
This question paper contains 4 printed pages.
Yoiir Roll So___
5221
B.Sc. (Prog.) / III
J
ACP-302 INSECTICIDEPESTICIDE FORMULATION, ANALYSIS, QUALITY CONTROL
(N.C. Admissions of 2005 and onwards)
Maximum Marks: 75
Time : 3 hours
( Write your Roll No. on the tap immediately on receipt of this question papa:)
Attempt any Jive questions. All questions carry equal marks.
1Answer the following:
(f) What arc dispersed phase and dispersing medium?
(u) Write down the structural formula for TMS.
(in) Define Algaicide and Acaricide with examples.
(zv) Write down the structural formula for the chemical compound obtained from calabar beans.
(V) What are contact and systemic insecticides? Give suitable examples. 3x5=15
2. Discuss in brief:
(i) Dihydro chlorination of DDT
(a) Redox titration (ziz) Blue shift
P.XO.
(iv) R F value m Chromatography
(v) Solid formulations
3. Explain with chemical equations, what happens when
(i) BHC is refluxed with alco NaOH.
(u) Endosulfan is mixed with KMn04 solution.
(wz) Malathion is isomerised
(iv) Methomyl is hydrolysed
(v) Heptachor is oxidised. 3x5 = 15
4. (a) What agro-chemicals arc prepared from the
following chemicals, and how?
(/) Sod -/7-mtrophenate
(it) Thiophosphoryl chloride
(in) Dimethyl phosphorodithioic acid
(iv) Ethyl succinate 3+3
(b) The oxidation products of O.P. compunds, ue., sulphoxide and sulphur show high anticholinesterase activity, but the toxicity of the substances does not always grow, in general trend is
O
>P(S) - S > P(S) S- > P(S)... s
1
o
o
Explain in brief 5
(c) Explain with one example each:
(i) Dealkylation
() Dcsulfuration. 4
5- (fl) Depict the stereoisomers of HCH (a,/? and y) only. 6
(fr) Discuss the role of enzyme AChE before and after the toxification of insects. 5
(c) Elaborate the hydrolysis of Malathion in both acidic and alkaline medium. 4
6 (a) How will the endosulphan be prepared? Give chemical equations. 3
(6) Explain chemical shift with suitable example. 3
(c) Depict the banding vibration in LR. Spectroscopy 3
(id) Discuss the analysis of DDT. 3
(e) Write down the structural formula and discuss properties of Nicotine. 3
7. Write short rotes on.
(z) Liquid .ormulation
(a) Chromatography in the separation of compounds (m) Pcsticide pollution.
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