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Seat No.:
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Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (New) EXAMINATION — WINTER 2018
Subject Code:2133501 Date:28/11/2018
Subject Name:Organic Chemistry
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Time:10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
- Give IUPAC names of
- CH=CH-CH(NH2)-CH=CH-CH2-COOH
- Glycerol
- C(CH3)3
- Write a note on Benzidine Rearrangement?
- Give the reactions of phenol.
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MARKS
03
04
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07
Q.2
- Why is fluoro acetic acid a stronger acid than acetic acid?
- Give R and S configuration of
- Give E and Z configuration of
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03
04
07
- OR
- Explain mechanism of Hydroboration-oxidation reaction.
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Q.3
- Explain Meso compounds and write a note on different methods of resolution.
- Explain the difference between E1 and E2 mechanism
- Explain conformers of Ethane.
07
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- OR
- Explain SN1 mechanism in detail.
- OR
- Explain the importance of knowing mechanism of any chemical reaction.
- Explain : Hyperconjugation and Resonance
- Explain the generation, stability and reactions of carbonium ion
- What is the importance of mechanism in organic synthesis.
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03
04
07
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- Explain generation and stability of carbocation
03
04
Total Marks: 70
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Q.4
- Give the methods of synthesis of aromatic amines? Give the reactions of aniline with (i) Acetyl chloride (ii) Benzaldehyde (iii) Methyl iodide (iv) BDC (v) Potassium Dichromate
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07
- OR
- Explain ozonolysis.
- Give the reactions of Bromobenzene with Ethyl bromide, KNH2, NiAl/NaOH and Mg/ether.
- In which mechanism we get inversion of symmetry? Explain it.
- Explain stereoisomerism in tartaric acid.
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03
04
07
Q.5
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- Explain Cannizaro reaction.
- Write a note on Pinacol-Pinacolone rearrangement.
03
04
07
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- OR
- Explain conformers of butane.
- Write a note on aldol and cross aldol reaction.
- Explain the mechanism of Hofmann reaction.
04
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07
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