Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 3rd Sem New 2133605 Organic Chemistry For Technologists Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER?III (New) EXAMINATION ? WINTER 2018
Subject Code: 2133605 Date: 01/12/2018
Subject Name: Organic Chemistry for Technologists
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain Ozonolysis reaction with example. 03
(b) Write a short note on Inductive effect. 04
(c) Explain SN
1
& SN
2
reaction with mechanism.
07
Q.2 (a) Explain only mechanism of diazotization reaction. 03
(b) Explain Markovnikov rule with example. 04
(c) Write a short note on following:
i. Stability of carbocation
ii. Hyperconjugation
07
OR
(c) Who were the pioneers of Alkylation & Acylation reaction? Explain its
mechanism.
07
Q.3 (a) Write a note on Saccharin. 03
(b) How does aniline react with;
1.Acetic anhydride
2.Bromine
3.Chloroform and alc.KOH
4.NaNO2 at 0 to 5
0
C
04
(c) Explain Witting reaction with mechanism. 07
OR
Q.3 (a) Give use & synthesis of DDT. 03
(b) Draw structure corresponding to the following IUPAC names:
i. 4-Hexen-3-one
ii. 2-Butenal
iii. 2-Methyl-4-oxopentanoic acid
iv. 1-Ethoxy-1-propanol
04
(c) Name the following reaction and Explain its mechanism.
07
Q.4 (a) Write a short note on Diels-Alder reaction. 03
(b) Write the IUPAC names for each of the following compounds:
i. CH3CH2CH(OCH3)CH2COCl
ii. CH3CH2COCH2CH2COOCH3
iii. CH 3CH=CHCH 2OH
iv. CH 2=CH-CH 2CH=CH 2
04
(c) Explain Aldol and Cross aldol reaction with mechanism. 07
OR
Q.4 (a) Write a short note on Birch reduction. 03
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER?III (New) EXAMINATION ? WINTER 2018
Subject Code: 2133605 Date: 01/12/2018
Subject Name: Organic Chemistry for Technologists
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Explain Ozonolysis reaction with example. 03
(b) Write a short note on Inductive effect. 04
(c) Explain SN
1
& SN
2
reaction with mechanism.
07
Q.2 (a) Explain only mechanism of diazotization reaction. 03
(b) Explain Markovnikov rule with example. 04
(c) Write a short note on following:
i. Stability of carbocation
ii. Hyperconjugation
07
OR
(c) Who were the pioneers of Alkylation & Acylation reaction? Explain its
mechanism.
07
Q.3 (a) Write a note on Saccharin. 03
(b) How does aniline react with;
1.Acetic anhydride
2.Bromine
3.Chloroform and alc.KOH
4.NaNO2 at 0 to 5
0
C
04
(c) Explain Witting reaction with mechanism. 07
OR
Q.3 (a) Give use & synthesis of DDT. 03
(b) Draw structure corresponding to the following IUPAC names:
i. 4-Hexen-3-one
ii. 2-Butenal
iii. 2-Methyl-4-oxopentanoic acid
iv. 1-Ethoxy-1-propanol
04
(c) Name the following reaction and Explain its mechanism.
07
Q.4 (a) Write a short note on Diels-Alder reaction. 03
(b) Write the IUPAC names for each of the following compounds:
i. CH3CH2CH(OCH3)CH2COCl
ii. CH3CH2COCH2CH2COOCH3
iii. CH 3CH=CHCH 2OH
iv. CH 2=CH-CH 2CH=CH 2
04
(c) Explain Aldol and Cross aldol reaction with mechanism. 07
OR
Q.4 (a) Write a short note on Birch reduction. 03
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2
(b) How will you convert;
a. Bromo benzene ? Benzoic acid
b. Aniline ? p-Nitro aniline
04
(c) How will you convert primary amide to primary amine? Give name of the
reaction and explain its mechanism also.
07
Q.5 (a) Explain Reformatsky reaction with mechanism. 03
(b) Explain why,
1. phenol is more acidic than ethyl alcohol.
2. p-Toluidine is more basic than aniline.
04
(c) Explain only mechanism of the following reaction:
1. Benzillic acid rearrangement
2. Baker Venkatraman reaction
07
OR
Q.5 (a) Explain Canizzaro reaction with mechanism. 03
(b) Compound A, C 7H 5O 6N 3, undergoes oxidation with acidified potassium
dichromate to give a mono carboxylic acid B C7H3O8N3. When B is heated
in acetic acid solution,C C6H3O6N3 is formed. Deduce the structural
formulas of A, B and C. Write equations for the reactions involved.
04
(c) Name the following reaction and Explain its mechanism
07
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This post was last modified on 20 February 2020