Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2133605 Organic Chemistry For Technologists Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 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 2019
Subject Code: 2133605 Date: 30/11/2019

Subject Name: Organic Chemistry for Technologists
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) Write a short note on Inductive effect with example. 03
(b) What is essential difference between a free radical reaction and an ionic
reaction?
04
(c) Explain SN
1
& SN
2
reaction with mechanism. 07

Q.2 (a) Write a note on Kolbe reaction. 03
(b)
Explain Saytzeff rule with example.
04
(c) Explain mechanism of diazotization reaction. 07
OR
(c) Explain friedel crafts Alkylation & Acylation with mechanism. 07
Q.3 (a) Write a note on Chloramine T. 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 Mannich 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-oxobutanoic acid
iv. Ethyl propanoate
04
(c) Explain Curtius reaction with 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. CH3CH2COCH2CH2COOH
iii. CH3CH=CHCH2CHO
iv. CH2=CH-CH2CH=CH2
04
(c) How will you convert primary amide to primary amine? Give name of the
reaction and explain its mechanism also.
07

OR
Q.4 (a) Write a short note on Birch reduction. 03
(b) How will you convert;
a. benzene ? benzyl alcohol
b. Aniline ? m-Nitro aniline
04
(c) Explain Aldol and Cross aldol reaction with mechanism. 07
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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? III (New) EXAMINATION ? WINTER 2019
Subject Code: 2133605 Date: 30/11/2019

Subject Name: Organic Chemistry for Technologists
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) Write a short note on Inductive effect with example. 03
(b) What is essential difference between a free radical reaction and an ionic
reaction?
04
(c) Explain SN
1
& SN
2
reaction with mechanism. 07

Q.2 (a) Write a note on Kolbe reaction. 03
(b)
Explain Saytzeff rule with example.
04
(c) Explain mechanism of diazotization reaction. 07
OR
(c) Explain friedel crafts Alkylation & Acylation with mechanism. 07
Q.3 (a) Write a note on Chloramine T. 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 Mannich 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-oxobutanoic acid
iv. Ethyl propanoate
04
(c) Explain Curtius reaction with 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. CH3CH2COCH2CH2COOH
iii. CH3CH=CHCH2CHO
iv. CH2=CH-CH2CH=CH2
04
(c) How will you convert primary amide to primary amine? Give name of the
reaction and explain its mechanism also.
07

OR
Q.4 (a) Write a short note on Birch reduction. 03
(b) How will you convert;
a. benzene ? benzyl alcohol
b. Aniline ? m-Nitro aniline
04
(c) Explain Aldol and Cross aldol reaction with mechanism. 07
2
Q.5 (a) Explain Reformatsky reaction with mechanism 03
(b) Explain why,
1. p-nitroaniline is less basic than aniline.
2. p-Toluidine is more basic than aniline.
04
(c) What products are obtained by reduction of nitrobenzene under different
conditions?
07
OR

Q.5 (a) Explain Cannizaro reaction with mechanism. 03
(b) Enlist Hinsberg test. 04
(c) Explain Arndt Estert reaction with its mechanism.






07

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