Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
B.Pharm. SEMESTER III- • EXAMINATION SUMMER 2017
Subject Code: 2230004 Date: 07/06/2017
Subject Name: Pharmaceutical Chemistry-IV (Organic Chemistry-I)
Time: 02:30 PM 5:30 PM Total Marks: 80
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Explain the following terms giving suitable examples:

Electromeric effect
ii)
Hybridization
iii)
Hyperconjugation
iv)
Electrophile

Tautomerism
vi)
Free radical
06

Explain relative stability of primary, secondary and tertiary carbocation.
05

Explain how Bonding Molecular Orbital and Anti-bonding Molecular Orbitals (ABMO) are formed?
05
Q.2

Give three different methods of preparation for alkanes.
06

What is Saytzeff rule? Give an example.
05

Explain resonance. Write the necessary conditions for resonance.
05
Q.3

Give structural formula of following compounds:

Neohexane
ii)
Allyl alcohol
iii)
Phenylacetylene
iv)
Anthracene

1,3-Butadiene
vi)
1-Butyne
06

Write a short note on Oxymercuration-Demercuration of alkene.
05

Write a note on Markonikov's rule.
05
Q.4

Write a note on the following:
Lucas test
ii) Williamson synthesis of ethers
06

How are alkynes prepared? Discuss important properties of alkynes.
05

What is Huckel's rule? Write the structure of three compounds that follow this rule.
05
Q.5

Discuss the mechanism and stereochemistry of SN1 and SN2 reactions.
06

Give scheme for Haworth's synthesis of naphthalene with benzene as starting material.
05

Write a note on peroxide effect.
05
Q. 6

Give the mechanism of Friedel-Crafts alkylation and acylation of benzene.
06

Give general methods for preparation of alkene.
05

Explain in detail any two reactions of anthracene.
05
Q.7

What are carbenes? Give some examples. Discuss the structure of carbenes.
06

Explain in detail Liebig's method for quantitative estimation of carbon and hydrogen of an organic compound.
05

Explain the terms solvolysis and anchimeric assistance.
05