Veer Narmad South Gujarat University 2011-2nd Year B.Sc Chemistry SB-0710 ( organic ) : - 4 ( new ) - Question Paper
SB-0710
Second Year B. Sc. Examination March / April - 2011 Chemistry (Organic) : Paper - IV (New course)
Time : 3 Hours] :
[Total Marks : 70
N Seat No.:
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Name of the Examination :
S. Y. B. SC.
Name of the Subject:
Chemistry (Organic) : Paper - 4 (New)
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-Subject Code No.: |
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-Section No. (1,2......): Nil |
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SB-0710]
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ENGLISH VERSION
Instructions : (1) As per the instruction no. 1 of page no. 1.
(2) All the sub questions given in question-1 are compulsory.
(3) Answer in brief and to the point
(4) Figures to the right indicate marks of the question.
1 Answer the following questions in short : 15
(i) Write the reaction of indole with alkali in presence of chloroform.
(ii) State Hoffmann rule.
(iii) Give the examples of fat-soluble vitamins.
(iv) What is the difference between oligosaccharides and polysaccharides ?
(v) How can nitriles be reduced by LiAlH4 ?
(vi) Write structural formula and use of methyl orange
(vii) Write carbyl amine reaction.
(viii) How will you synthesise acetonyl acetone form AAE ?
(ix) Give the distinguishing reaction of nitrile and isonitrile.
(x) Write the general formula of sulphoxide and sulphone.
(xi) Give the structural formula of parabonic acid and alantoin.
(xii) Explain term : Hypsochromic shift.
(xiii) Give the names of catalysts used in Friedel-Crafts reaction.
(xiv) Name the derivatives of monocarboxylic acid.
(xv) How will you synthesize 8-hydroxy quinoline from quinoline ?
(a) Explain Bayer-Villiger oxidation. 4
(a) Explain Wittig reaction. 4
(b) What is dehydrogenation? State the rule to which 4 it follows.
(b) Explain the mechanism of E2 reaction with illustration. 4
(c) What are ketenes ? How are they generated ? 3
3 (a) Write the oxidation and reduction reaction of 4
isoquinoline.
OR
(a) Write important substitution reactions of benzofuran. 4
(b) Give the synthesis of perylene. 4
OR
(b) Give the synthesis of 1:2 benzanthracene. 4
(c) How will you determine the number and position 3 of -OH groups and double bond in Vitamin-C ?
(a) Give the synthesis of LiAlH4. How can reduction
of acid, ester and aldehyde be carried out with this reagent ?
(a) How will you prepare primary alcohol, acid, hydrocarbon 4 and aldehyde by using Grignard reagent ?
(b) How will you prepare adipic acid, crotonic acid and 4 butanone from AAE ?
(b) Give the synthesis of malonic ester. How will you 4 prepare n-butyric acid and barbibutric acid from DEM ?
(c) Explain step-down reaction of carbon with illustration. 3
5 (a) Give the synthesis of diphenyl, chlorobenzene phenyl 4
hydrazine and phenol by diazotisation.
(a) What is diazotisation ? Explain the mechanism of 4 diazotisation reaction.
(b) Write derivatives of monocarboxylic acid. Give two 4 methods of preparation and two chemical properties of ester.
(b) Give two general methods of preparation and two 4 chemical properties of monocarboxylic acid.
(c) What are urethanes ? Give three methods of 3 preparation of ethyl carbamate.
6 (a) Write the synthesis and uses of toluene sulphonic acid. 4
(a) Write the synthesis and uses of saccharin and 4 chloramine-T.
(b) Explain terms : 4 Bathochromic shift and Hyperchromic effect. If the transmittance of a solution is 19.4% calculate the absorbance of the solution.
(b) Explain n > ty * and ty > ty * transitions obtained in 4 ultraviolet spectra.
(c) Prove that uric acid contains five and six membered 3 rings.
SB-0710] 7 [2500]
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| Earning: Approval pending. |
