Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) B.Sc (Non-Medical) 2020 March Previous Question Papers
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Sc. (Non Medical) (2018 Batch) (Sem.?3)
ORGANIC CHEMISTRY-II
Subject Code : BSNM-301-18
M.Code : 76900
Time : 3 Hrs. Max. Marks : 50
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying ONE 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) Define Huckel rule with example.
(b) Why is o-nitrophenol more volatile compared to p-nitrophenol?
(c) Write IUPAC name of glycerol.
(d) Give one equation to distinguish between aldehyde and ketone.
(e) Write the order of boiling point of alkyl halide, alcohol and aldehyde of comparable
molar mass.
(f) What is Tollen?s reagent?
(g) Give IUPAC name of sec-butyl chloride.
(h) Write down the reaction of preparation of phenol from cumene.
(i) Why alcohols are generally soluble in water?
(j) Which has higher dipole moment: Phenol or Ethanol?
SECTION-B
2. (a) What conditions are to be satisfied for a compound to be aromatic? State which of the
following are aromatic and why?
(b) Why are polyhydric alcohols generally viscous liquids?
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1 | M-76900 (S105)-438
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Sc. (Non Medical) (2018 Batch) (Sem.?3)
ORGANIC CHEMISTRY-II
Subject Code : BSNM-301-18
M.Code : 76900
Time : 3 Hrs. Max. Marks : 50
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying ONE 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) Define Huckel rule with example.
(b) Why is o-nitrophenol more volatile compared to p-nitrophenol?
(c) Write IUPAC name of glycerol.
(d) Give one equation to distinguish between aldehyde and ketone.
(e) Write the order of boiling point of alkyl halide, alcohol and aldehyde of comparable
molar mass.
(f) What is Tollen?s reagent?
(g) Give IUPAC name of sec-butyl chloride.
(h) Write down the reaction of preparation of phenol from cumene.
(i) Why alcohols are generally soluble in water?
(j) Which has higher dipole moment: Phenol or Ethanol?
SECTION-B
2. (a) What conditions are to be satisfied for a compound to be aromatic? State which of the
following are aromatic and why?
(b) Why are polyhydric alcohols generally viscous liquids?
2 | M-76900 (S105)-438
3. Why phenols are more acidic than alcohols? Explain in detail
4. (a) Differentiate between the following :
(i) Halogenation and Sulphonation of benzene
(ii) Perkin and Knoevenagel condensation
5. (a) Write a short note on elimination addition mechanism for nucleophilic substitution
reaction of aryl halides.
(b) Give difference between S
N
1 and S
N
2 reaction of alkyl halide.
6. (a) Write short notes on the following :
(i) Pinacol-Pinacolone rearrangement
(ii) Reimer Tiemann Reaction
SECTION-C
7. (a) Explain the order of reactivity of primary, secondary and tertiary alcohols with
sodium metal.
(b) Explain claisen rearrangement with mechanism.
8. Write short note on the following :
(a) Fries Rearrangement
(b) Wittig reaction
(c) Friedel craft reaction
(d) Acidic strength of alcohols and phenols
(e) Acetal as protecting group
9. (a) Write a short note on preparation aldehyde from acid chloride.
(b) Explain the mechanism of following reaction :
(i) Manich reaction
(ii) Aldol Condensation
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 post was last modified on 02 April 2020