Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2133501 Organic Chemistry Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 3rd Sem New 2133501 Organic Chemistry Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 2133501 Date: 28/11/2019

Subject Name: Organic Chemistry
Time: 02:30 PM TO 05:00 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) Why flouro acetic acid is more stronger acid than acetic acid. 03
(b) Write a short note on mesomeric effect. 04
(c) Explain generation, stability and reactions of carbocation. 07

Q.2 (a) Explain the importance of knowing mechanism of any chemical reaction. 03
(b) What is essential difference between E
1
and E
2
mechanism. 04
(c) Explain mechanism of diazotization reaction. 07
OR
(c) Explain SN
1
and SN
2
reaction with mechanism. 07
Q.3 (a) Explain the importance of Hydrogenation reaction in organic synthesis. 03
(b) How does aniline react with;
1.Aldehyde
2.Bromine
3.Chloroform and alc.KOH
4.NaNO2 at 0 to 5
0
C
04
(c) Explain cannizaro reaction with its mechanism. 07
OR
Q.3 (a) Give use & synthesis of DDT. 03
(b) Explain conformers of butane. 04
(c) Explain Hoffman reaction with mechanism.

07
Q.4 (a) Explain Stereoisomerism in Tartaric acid. 03
(b) Explain generation and stability of carbanion. 04
(c) Define the terms:enantiomers & disteromers.Identify enantiomeric and
diasteromeric pairs from following


07

OR
Q.4 (a) Explain Conformers of Ethane. 03
(b) How will you convert Aniline ? p-Nitro aniline? 04
(c) Write note on (i) Diastereomers (ii) Different methods of resolution 07
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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 2133501 Date: 28/11/2019

Subject Name: Organic Chemistry
Time: 02:30 PM TO 05:00 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) Why flouro acetic acid is more stronger acid than acetic acid. 03
(b) Write a short note on mesomeric effect. 04
(c) Explain generation, stability and reactions of carbocation. 07

Q.2 (a) Explain the importance of knowing mechanism of any chemical reaction. 03
(b) What is essential difference between E
1
and E
2
mechanism. 04
(c) Explain mechanism of diazotization reaction. 07
OR
(c) Explain SN
1
and SN
2
reaction with mechanism. 07
Q.3 (a) Explain the importance of Hydrogenation reaction in organic synthesis. 03
(b) How does aniline react with;
1.Aldehyde
2.Bromine
3.Chloroform and alc.KOH
4.NaNO2 at 0 to 5
0
C
04
(c) Explain cannizaro reaction with its mechanism. 07
OR
Q.3 (a) Give use & synthesis of DDT. 03
(b) Explain conformers of butane. 04
(c) Explain Hoffman reaction with mechanism.

07
Q.4 (a) Explain Stereoisomerism in Tartaric acid. 03
(b) Explain generation and stability of carbanion. 04
(c) Define the terms:enantiomers & disteromers.Identify enantiomeric and
diasteromeric pairs from following


07

OR
Q.4 (a) Explain Conformers of Ethane. 03
(b) How will you convert Aniline ? p-Nitro aniline? 04
(c) Write note on (i) Diastereomers (ii) Different methods of resolution 07
2
Q.5 (a) Write a short note on ozonolysis. 03
(b) Explain Pincol-Pinacolone reaction with mechanism.. 04
(c) What products are obtained by reduction of nitrobenzene under different
conditions?
07
OR

Q.5 (a) Write the mechanism of Benzidine rearrangement. 03
(b) Write a note on NGP. 04
(c) Draw a detailed flowsheet for chemical reactions of sulfonic acids. 07
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