Download PTU B.Sc-BT 2020 March 3rd Sem 76608 Organic Chemistry Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) B.Sc. in Biotechnology 2020 March Previous Question Papers

1 | M-76608 (S2)- 410
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Sc. (BT) (2018 Batch) (Sem.?3)
ORGANIC CHEMISTRY
Subject Code : BSBT-301-18
M.Code : 76608
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Write briefly :
a) Acetylene has garlic order why?
b) Is 1,3 butadiene is more stable than 1,4-pentadiene?
c) Define aromaticity.
d) Why terminal alkynes are acidic?
e) Give two industrial applications of ethylene.
f) What are delocalized bonds?
g) Explain the Markownikoff?s rule.
h) What are carbon free radical?
i) Out of boat or chair conformation of cyclohexane which is more stable.
j) What is resonance?
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1 | M-76608 (S2)- 410
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Sc. (BT) (2018 Batch) (Sem.?3)
ORGANIC CHEMISTRY
Subject Code : BSBT-301-18
M.Code : 76608
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Write briefly :
a) Acetylene has garlic order why?
b) Is 1,3 butadiene is more stable than 1,4-pentadiene?
c) Define aromaticity.
d) Why terminal alkynes are acidic?
e) Give two industrial applications of ethylene.
f) What are delocalized bonds?
g) Explain the Markownikoff?s rule.
h) What are carbon free radical?
i) Out of boat or chair conformation of cyclohexane which is more stable.
j) What is resonance?
2 | M-76608 (S2)- 410
SECTION-B
2. Explain the aromaticity.
3. What is hypercongujation?
4. Explain the kekule structure.
5. Explain the carbocation and their methods of formation.
6. Discuss the mechanism of addition of a halogen acid to an alkene.

SECTION-C
7. What is carbene? Discuss their formation as well as their relative stability order.
8. Explain the Inductive and electromeric effects.
9. Explain the mechanism of following reactions :
a) Kolbe?s reaction.
b) Reimer Tiemann reaction







NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.


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