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Roll No. HEEEEEEEEEE Total No. of Pages : 02
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Total No. of Questions : 09B.Sc. (BT) (2018 Batch) (Sem.-3)
ORGANIC CHEMISTRY
Subject Code : BSBT-301-18
M.Code : 76608
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Time : 3 Hrs. Max. Marks : 60INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
- Write briefly :
- Acetylene has garlic order why?
- Is 1,3 butadiene is more stable than 1,4-pentadiene?
- Define aromaticity.
- Why terminal alkynes are acidic?
- Give two industrial applications of ethylene.
- What are delocalized bonds?
- Explain the Markownikoff’s rule.
- What are carbon free radical?
- Out of boat or chair conformation of cyclohexane which is more stable.
- What is resonance?
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Firstranker's choice FirstRanker.comSECTION-B
- Explain the aromaticity.
- What is hypercongujation?
- Explain the kekule structure.
- Explain the carbocation and their methods of formation.
- Discuss the mechanism of addition of a halogen acid to an alkene.
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SECTION-C
- What is carbene? Discuss their formation as well as their relative stability order.
- Explain the Inductive and electromeric effects.
- Explain the mechanism of following reactions :
- Kolbe’s reaction.
- Reimer Tiemann reaction
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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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This download link is referred from the post: PTU B.Sc (Biotechnology) 2020 March Previous Question Papers
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