Seat No.: Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-III (OLD) EXAMINATION - WINTER 2017
Subject Code:132805 Date:01/12/2017
Subject Name: Organic Chemistry
Time: 10:30 AM to 01:00 PM
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) Explain in short. [07]
- Define Organic Reaction Mechanism?
- Define Atomic Orbital.
- What is Quantum No?
- Carbonium ions are positive by nature Why?
- Define Polynuclear Hydrocarbon?
- Ketone on oxidation gives?
- Principle of Chromatography?
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(b) Define the following terms: [07]
- Plane Polarized Light.
- Bond Length.
- Polarity.
- Test for Primary Amine.
- Molecular Orbital.
- Lewis Acid and Base.
- Coordinate Bond.
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Q.2 (a) Describe in detail different General methods of preparation, properties and uses of Aldehydes and Ketones. [07]
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(b) (1) Crystallization and Sublimation. [07]
(2) Hybridization.
OR
(b) (1) Vacuum distillation [07]
(2) Difference between Primary, Secondary and Tertiary Alcohols.
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Q.3 (a) What is the utility of Isomers. Explain Structural isomerism in detail. [07]
(b) Brief Carbonium, Carbanion and Free Radical. [07]
OR
Q.3 (a) Write in detail the preparation of Naphthalene and Anthracene. [07]
Q.4 (a) Write in general preparation, properties and uses of Carboxylic acids. [07]
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(b) Write preparation, properties and uses of Nitro compounds. [07]
OR
Q.4 (a) Explain Electrophillic Addition and Substitution reaction with mechanism. [07]
(b) Explain Cummene process and Sandmeyer reaction with mechanism. [07]
Q.5 (a) Write preparation, properties and uses of Thiophene and Pyridine. [07]
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(b) Explain Nucleophillic Substitution and Addition reaction with example. [07]
OR
Q.5 (a) Explain preparation, properties and uses of Aryl halides. [07]
(b) Explain Solubility. Show the importance of Protic and Aprotic solvents. [07]
(b) Brief different tests to identify Phthalic acid in laboratory. [07]
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